When choosing a home security system kit, the goal is to find a reliable setup that offers comprehensive coverage without complexity or excessive costs. The eufy Security 5-Piece Home Alarm Kit stands out as the best overall for its user-friendly app and straightforward installation. For those seeking a budget-friendly option, the Ring Alarm 8-Piece Kit offers solid features at a lower price point. If you want a premium system with built-in Wi-Fi and smart home integration, the Ring Alarm Pro makes a compelling case. Each option involves tradeoffs in terms of coverage, subscription fees, or ease of setup. Keep reading to see how these and other picks compare to help you find the ideal security kit for your needs.
Complete the kit
Key Takeaways
- The best overall kits balance ease of installation, reliable monitoring, and app control without high ongoing costs.
- Coverage size and sensor quantity vary widely; larger homes typically demand more comprehensive systems.
- Subscription fees are common for advanced features like professional monitoring or cloud storage, influencing overall value.
- Smart home compatibility and future expandability are key considerations for tech-savvy users.
- Refurbished or lower-cost kits can be effective, but may sacrifice some features or longevity.
| eufy Security 5-Piece Home Alarm Kit, Home Security System with Keypad, Motion Sensor, Entry Sensors, and App Control | ![]() | Best Overall for Easy Setup and No Monthly Fees | Number of Entry Sensors: 2 | Includes: HomeBase, keypad, motion sensor, entry sensors, manual | Monitoring Service: Optional 24/7 professional monitoring | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Alarm 8-Piece Kit (Newest Model) – Home and Business Security System | ![]() | Best for 1-2 Bedroom Homes with Remote Control Needs | Number of pieces: 8 | Suitable for: 1-2 bedroom homes | Includes: base station, keypad, contact sensors, motion detector, range extender | VIEW ON AMAZON | See Our Full Breakdown |
| SimpliSafe 9 Piece Wireless Home Security System with HD Camera | ![]() | Best for Wireless, Smart Home Compatibility, and No Long-term Contracts | Number of pieces: 9 | Camera: HD security camera | Sensors: 4 entry sensors, 2 motion sensors | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Alarm 14-Piece Kit (Newest Model) – Wireless Smart Home Security System | ![]() | Best for Larger Homes with Expandable Coverage and Professional Monitoring | Number of pieces: 14 | Includes: Base station, 2 keypads, 8 contact sensors, 2 motion detectors, 1 range extender | Compatibility: Alexa, Ring Protect Plan | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Alarm Pro (Newest Model) 14-Piece Kit with Built-in eero Wi-Fi 6 Router | ![]() | Best for Integrated Home Security and High-Speed Internet | Kit Components: Alarm Pro Base Station, 2 Keypads, 8 Contact Sensors, 2 Motion Detectors, 1 Alarm Range Extender | Wi-Fi Speed: Up to 900 Mbps | Coverage Area: Up to 1,500 sq. ft. | VIEW ON AMAZON | See Our Full Breakdown |
| SimpliSafe 8 Piece Wireless Home Security System with Professional Monitoring | ![]() | Best Overall for Easy, Reliable Protection | Number of pieces: 8 | Battery life (Base Station): up to 24 hours | Sensor detection range: 35 feet | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Alarm 8-Piece Kit (Refurbished, Like-New) | ![]() | Best for Small Homes on a Budget | Kit Includes: 1 base station, 1 keypad, 4 contact sensors, 1 motion detector, 1 range extender | Compatibility: Ring app, Alexa | Monitoring: Optional 24/7 professional | VIEW ON AMAZON | See Our Full Breakdown |
| 15-Piece WiFi Home Security System, DIY Wireless Alarm Kit with App Alerts and No Subscription | ![]() | Best for DIY Enthusiasts and Expandability | Number of Sensors: 20 | Remote Controls: 5 | Alarm Sound: 120dB | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Alarm 14-Piece Kit with 2 Ring Outdoor Cam Plus, Battery (2-pack) | ![]() | Best for Larger Homes with Outdoor Surveillance | Number of pieces: 14 | Includes: Base station, 2 keypads, 8 contact sensors, 2 motion detectors, 1 range extender | Cameras: 2 Ring Outdoor Cam Plus, Battery | VIEW ON AMAZON | See Our Full Breakdown |
| Ring Alarm 5-Piece Kit (Newest Model) – Wireless Smart Home Security System | ![]() | Best for Apartments and Condos | VIEW ON AMAZON | See Our Full Breakdown | |||
| Wireless Home Security Alarm System Kit with WiFi+GSM, 24 Sensors, App & Remote Control, No Monthly Fees, SOS Button, Alexa Compatibility | ![]() | Best All-in-One Wireless System with No Monthly Fees | Number of Sensors: 24 | Connectivity: WiFi+GSM/4G | Alarm Volume: 110dB | VIEW ON AMAZON | See Our Full Breakdown |
More Details on Our Top Picks
eufy Security 5-Piece Home Alarm Kit, Home Security System with Keypad, Motion Sensor, Entry Sensors, and App Control
This kit stands out for its straightforward installation process, making it ideal for homeowners who want a self-installed system without ongoing costs. Unlike the Ring Alarm 8-Piece, which requires a subscription for remote features, the eufy system offers core functionalities with no monthly fees—great for budget-conscious users. However, its compatibility with other smart home devices is limited, which could be a downside for those seeking an integrated ecosystem. The included sensors and keypad provide essential coverage, and instant app alerts enhance real-time awareness. The optional professional monitoring adds security but incurs extra costs, making this a flexible choice for those who prefer simplicity over extensive smart features.
Pros:- Quick, tool-free installation suitable for DIY setup
- No recurring fees for basic security functions
- Instant mobile alerts for immediate awareness
Cons:- Optional professional monitoring involves additional costs
- Limited compatibility with other smart home ecosystems
Best for: Homeowners seeking a reliable, easy-to-install security system without monthly fees.
Not ideal for: Tech enthusiasts wanting extensive smart home integration or advanced automation features.
- Number of Entry Sensors:2
- Includes:HomeBase, keypad, motion sensor, entry sensors, manual
- Monitoring Service:Optional 24/7 professional monitoring
Our verdict“A strong pick for users who prioritize straightforward security with minimal ongoing expenses.”
Ring Alarm 8-Piece Kit (Newest Model) – Home and Business Security System
This kit is tailored for small homes, offering an easy setup and robust mobile controls, including remote arming and disarming via the Ring app—features that outshine the simpler eufy system. Compared with the eufy kit, it requires a Ring Protect Plan to access remote features and professional monitoring, which adds to ongoing expenses. It supports voice commands and smart notifications, making it suitable for those who want remote control from anywhere. The additional cost for sensors and accessories means it’s best for buyers planning to expand their system over time. Overall, this kit balances ease of use with smart features, but the need for a subscription can be a barrier for some users.
Pros:- Simple installation with mobile notifications and voice control
- Supports remote arming/disarming through the app
- Expandable with additional sensors and accessories
Cons:- Requires subscription for remote features and professional monitoring
- Additional sensors and accessories are sold separately
Best for: Small home dwellers wanting remote access and smart notifications with minimal setup hassle.
Not ideal for: Users seeking a system with no subscription or those on a tight budget.
- Number of pieces:8
- Suitable for:1-2 bedroom homes
- Includes:base station, keypad, contact sensors, motion detector, range extender
Our verdict“Ideal for small homes where remote access and smart alerts are priorities, despite subscription costs.”
SimpliSafe 9 Piece Wireless Home Security System with HD Camera
This system excels for users who want a completely wireless setup with smart home integration, including Alexa and Google Assistant. Compared to the Ring kits, it offers a more flexible wireless experience without requiring a subscription for basic monitoring, making it attractive for those wary of ongoing fees. The included HD camera and multiple sensors provide broad coverage, and cellular backup enhances reliability during internet outages. On the downside, motion sensors may not be suitable for homes with large or pet-heavy households, and detailed camera specs are less highlighted, which could be a concern for users wanting high-resolution footage. It’s a versatile choice for those prioritizing ease of installation and smart home compatibility over extensive professional monitoring features.
Pros:- Wireless setup requires no wiring or drilling
- Compatible with Alexa and Google Assistant for smart control
- Includes cellular backup and long-lasting battery life
Cons:- Requires professional monitoring plan for cellular backup
- Limited detail on camera resolution and app features
Best for: Smart home users wanting wireless flexibility and no long-term contracts.
Not ideal for: Large households with pets over 60 lbs or those demanding high-resolution footage.
- Number of pieces:9
- Camera:HD security camera
- Sensors:4 entry sensors, 2 motion sensors
- Base Station battery life:up to 24 hours
- Compatibility:Alexa, Google Assistant
- Monitoring:Optional 24/7 professional monitoring
Our verdict“A great pick for tech-savvy users seeking wireless integration and flexible monitoring options.”
Ring Alarm 14-Piece Kit (Newest Model) – Wireless Smart Home Security System
This 14-piece kit is designed for medium to large homes, offering extensive coverage and ease of expansion, making it ideal for families needing multiple zones protected. Compared with the 8-piece Ring kit, it provides more sensors and motion detectors, supporting a comprehensive security network. Mobile app control and Alexa compatibility make operation straightforward, and professional monitoring is included, adding peace of mind. However, the system’s price could be a concern, especially since additional sensors are sold separately. The need for a subscription plan for full features might deter budget-conscious buyers. Overall, this kit offers a balanced mix of coverage and smart features, perfect for those seeking a scalable security setup.
Pros:- Easy to expand with additional sensors and accessories
- Mobile app control and Alexa support for convenience
- Includes professional 24/7 monitoring for comprehensive security
Cons:- Requires separate subscription for advanced remote features
- Additional sensors and accessories are sold separately
Best for: Families in larger homes wanting extensive coverage and professional monitoring.
Not ideal for: Small households or budget-sensitive users who don’t need many sensors or prefer no ongoing costs.
- Number of pieces:14
- Includes:Base station, 2 keypads, 8 contact sensors, 2 motion detectors, 1 range extender
- Compatibility:Alexa, Ring Protect Plan
Our verdict“A solid choice for larger homes needing flexible, scalable security with professional support.”
Ring Alarm Pro (Newest Model) 14-Piece Kit with Built-in eero Wi-Fi 6 Router
This kit offers a dual benefit: home security combined with a robust Wi-Fi 6 router, making it ideal for those who want a seamless network and security solution. Compared to the standard Ring Alarm kits, the built-in eero router supports high-speed internet up to 900 Mbps, providing reliable coverage for smart home devices and streaming. The system is straightforward to install and customize, with sensors, keypads, and a range extender included. However, full remote control and monitoring features depend on a subscription, and some features require a stable Wi-Fi connection. For users who want a secure home network integrated with their security system, this kit delivers a compelling package but at a higher price point and with some dependency on internet stability.
Pros:- Built-in Wi-Fi 6 router enhances internet connectivity
- Simple installation with comprehensive components
- Supports remote monitoring and professional response
Cons:- Requires separate subscription for full remote features
- Some features depend on Wi-Fi stability
Best for: Homeowners seeking combined security and high-speed Wi-Fi with easy installation.
Not ideal for: Users with unreliable internet or those who prefer standalone security systems without integrated routers.
- Kit Components:Alarm Pro Base Station, 2 Keypads, 8 Contact Sensors, 2 Motion Detectors, 1 Alarm Range Extender
- Wi-Fi Speed:Up to 900 Mbps
- Coverage Area:Up to 1,500 sq. ft.
- Subscription:Optional Ring Protect Plan
Our verdict“A compelling solution for tech-savvy homeowners wanting integrated security and fast internet connectivity.”
SimpliSafe 8 Piece Wireless Home Security System with Professional Monitoring
This system stands out for its simplicity of installation, requiring no wiring or drilling, making it ideal for renters or those wary of complex setups. It offers comprehensive coverage with entry sensors, motion detectors, and a panic button, comparable to the Ring Alarm 8-Piece Kit but with the added advantage of cellular backup and a free month of professional monitoring. While it supports smart home integration via Alexa and Google Assistant, it does require a subscription for alarm sound and police dispatch, which can be a drawback for budget-conscious buyers. Overall, this kit balances ease of use with reliable security features, making it suitable for those who prioritize straightforward setup and continuous protection even during outages.
Pros:- Easy to install without wiring or drilling
- Supports smart home integration with Alexa and Google Assistant
- Includes a free month of professional monitoring
- Battery backup and cellular backup for continuous protection
Cons:- Requires a subscription for alarm sound and police dispatch
- Limited to US availability
Best for: Renters or homeowners seeking a simple, reliable security system with professional monitoring included initially
Not ideal for: Homeowners who prefer a DIY system without ongoing monitoring fees or those seeking advanced customization
- Number of pieces:8
- Battery life (Base Station):up to 24 hours
- Sensor detection range:35 feet
- Field of view:90 degrees
- Pet compatibility:under 60 lbs
- Compatibility:Alexa and Google Assistant
- Warranty:1 year limited
Our verdict“Ideal for those wanting a straightforward, professionally monitored security system that works during outages.”
Ring Alarm 8-Piece Kit (Refurbished, Like-New)
This refurbished Ring Alarm kit offers a complete home security solution with the flexibility of remote monitoring and voice control, making it a solid choice for small homes or apartments. Compared to the SimpliSafe system, it provides similar sensor coverage but with the added benefit of app-based notifications and Alexa integration. However, being refurbished, it may come in generic packaging and lacks the initial professional monitoring included in some newer systems. The need for a separate subscription for professional monitoring and Alexa features increases ongoing costs, but the system’s compatibility with Ring’s ecosystem makes it especially appealing for existing Ring users. This kit makes sense for budget-conscious buyers who value integration and remote control without a high upfront investment.
Pros:- Complete security kit suitable for small homes
- Remote monitoring and mobile notifications
- Voice control with Alexa
- Refurbished units are more affordable
Cons:- Requires separate subscription for professional monitoring
- Refurbished device may have packaging and warranty limitations
Best for: Small homeowners or renters seeking a budget-friendly, customizable security setup with smart home features
Not ideal for: Users who want new equipment with full warranty coverage or built-in professional monitoring
- Kit Includes:1 base station, 1 keypad, 4 contact sensors, 1 motion detector, 1 range extender
- Compatibility:Ring app, Alexa
- Monitoring:Optional 24/7 professional
- Warranty:Limited
- Sensor Type:Contact, motion
- Number of pieces:8
Our verdict“A budget-friendly, flexible security kit ideal for small spaces and Ring ecosystem enthusiasts.”
15-Piece WiFi Home Security System, DIY Wireless Alarm Kit with App Alerts and No Subscription
This kit excels for users who prefer a DIY setup with extensive customization options and no ongoing fees. It supports up to 20 sensors, far surpassing the 15-piece limit of the Ring 14-Piece Kit, offering greater flexibility for expanding coverage. The inclusion of a loud 120dB siren and real-time app alerts ensures reliable, immediate feedback. Compared to the SimpliSafe model, it requires no subscription, but it only supports 2.4GHz WiFi, which could limit performance in congested networks. Its DIY nature makes it a good pick for tech-savvy homeowners who want control over their security system without ongoing costs, though some may find the setup process more involved than plug-and-play options.
Pros:- Easy DIY installation with no professional help needed
- Supports up to 20 sensors for extensive coverage
- No monthly subscription fees
- Seamless Alexa integration
Cons:- Limited to 2.4GHz WiFi networks
- Piece count limited to 15 without extra purchases
Best for: Tech-savvy homeowners who want a customizable, expandable security system without monthly fees
Not ideal for: Users with complex WiFi environments or those preferring professionally installed systems with integrated cellular backup
- Number of Sensors:20
- Remote Controls:5
- Alarm Sound:120dB
- Backup Battery:8 hours
- WiFi Compatibility:2.4GHz only
- Included Items:Base station, keypad, motion sensor, door sensors, remote controls
Our verdict“Perfect for DIYers seeking a flexible, cost-effective security setup that adapts to their needs.”
Ring Alarm 14-Piece Kit with 2 Ring Outdoor Cam Plus, Battery (2-pack)
This bundle caters to homeowners who want extensive coverage, including outdoor surveillance, with a comprehensive sensor array. It offers 14 pieces plus two outdoor cameras, making it suitable for 2-4 bedroom homes. Compared to the smaller 8-piece kits like the Ring Alarm 8-Piece, this adds outdoor monitoring for enhanced security. However, it requires a subscription for remote access and professional monitoring, which adds to the overall cost. The inclusion of two outdoor Ring Cam Plus units makes it well-suited for homes needing perimeter surveillance. This kit is ideal for those who want a robust, all-in-one security solution with added outdoor visibility but are prepared for ongoing subscription costs.
Pros:- Includes a comprehensive set of sensors and detectors
- Two outdoor cameras for perimeter security
- Remote notifications and control via Ring app
- Suitable for larger homes
Cons:- Requires subscription for remote access and professional monitoring
- Some components sold separately, additional costs possible
Best for: Homeowners seeking extensive indoor and outdoor security with the flexibility of remote monitoring
Not ideal for: Buyers on a tight budget or those preferring a system without outdoor cameras or ongoing fees
- Number of pieces:14
- Includes:Base station, 2 keypads, 8 contact sensors, 2 motion detectors, 1 range extender
- Cameras:2 Ring Outdoor Cam Plus, Battery
- Suitable for:2-4 bedroom homes
- App Control:Yes
- Monitoring:Optional subscription
Our verdict“An excellent choice for larger homes needing outdoor surveillance and broad coverage, with the understanding of ongoing subscription fees.”
Ring Alarm 5-Piece Kit (Newest Model) – Wireless Smart Home Security System
This compact kit caters perfectly to apartment dwellers or those with limited space, including just the essentials: Base Station, Keypad, Contact Sensor, Motion Detector, and Range Extender. Its simplicity and compatibility with Alexa make it easy to set up and control remotely. Compared to the larger 14-piece Ring kit, this setup is designed for smaller spaces and easier expansion, but it still requires a subscription for professional monitoring and some advanced features. The minimalist design suits renters who want straightforward security without extra bulk or expense, though additional sensors and accessories are sold separately. It’s a practical choice for those prioritizing ease of use and space conservation.
Pros:- Easy to set up and expand with additional sensors
- Mobile app notifications and remote control
- Voice control with Alexa
- Compact design suitable for apartments
Cons:- Professional monitoring and some features require subscriptions
- Additional sensors sold separately
Best for: Renters or small-space residents who want a simple, expandable security system with app and voice control
Not ideal for: Homeowners needing extensive coverage or outdoor surveillance without additional purchases
Our verdict“A practical, space-efficient security system perfect for renters and small households wanting easy control and expandability.”
This wireless security kit stands out for its combination of extensive sensor coverage and versatile connectivity options, supporting both WiFi and GSM/4G, which sets it apart from systems like the eufy Security 5-Piece Home Alarm Kit, that rely solely on WiFi. The inclusion of 24 sensors provides comprehensive coverage for larger homes or multi-room setups, while the app control and remote access make it straightforward to monitor from anywhere. However, the system’s dependence on a 4G SIM card introduces ongoing costs, and its WiFi support is limited to 2.4GHz, which can lead to network congestion or slower response times. The color display and voice assistant compatibility add user-friendly features, but the language support is somewhat limited compared to international models. Compared to alternatives like the Ring Alarm 8-Piece Kit, this system offers more sensors and better customization, but at the expense of requiring a SIM card and additional setup steps.
Pros:- Supports extensive sensor configuration for comprehensive coverage
- No monthly fees for operation, saving ongoing costs
- Supports remote control via smartphone app and voice commands
- Includes tamper protection and emergency SOS button
Cons:- Requires a 4G SIM card, which involves additional costs and management
- Limited to 2.4GHz WiFi, which may affect network performance
- International language support is restricted to 10 languages
Best for: Homeowners seeking a flexible, no-monthly-fee security system capable of large-area coverage and remote management via app and voice commands.
Not ideal for: Users who prefer a simple, plug-and-play solution with minimal ongoing costs, as the need for a SIM card and potential network limitations may be cumbersome.
- Number of Sensors:24
- Connectivity:WiFi+GSM/4G
- Alarm Volume:110dB
- Display:Color screen
- Languages Supported:10
- Compatibility:Alexa
- Power:Requires 4G SIM card
- App Support:Smart Life or Tuya
Our verdict“This pick is ideal for tech-savvy homeowners who want a customizable, wireless security system with no monthly fees but are prepared for the extra setup involving a SIM card.”

How We Picked
These products were evaluated based on their performance, ease of installation, build quality, and value for money. We also considered whether the systems offer user-friendly app controls, compatibility with smart home devices, and whether professional monitoring is included or optional. Systems with comprehensive sensor coverage and reliable connectivity ranked higher, while those with hidden fees or complicated setups were rated lower. Our ranking reflects a balance between affordability and features, highlighting options suitable for different home sizes and user preferences.Factors to Consider When Choosing Home Security System Kit
Choosing the right home security system kit involves more than just picking the most sensors or the lowest price. It’s important to consider how the system integrates with your daily life, future expansion plans, and whether ongoing costs fit your budget. Here are key factors to keep in mind beyond product specs to ensure you select a system that truly meets your needs.Coverage and Sensor Quantity
Assess the size of your home and the areas you want to protect. Larger homes require more sensors and possibly additional cameras to prevent blind spots. Remember, a system with too few sensors might leave you vulnerable, while excessive coverage for a small home could be unnecessary and more costly. Aim for a system that scales with your property’s size without overpaying for features you don’t need.
Ease of Installation and Use
Look for systems that are straightforward to set up, especially if you’re installing DIY. User interface matters too—an intuitive app with clear instructions can save you time and frustration. Consider whether the system offers wireless setup or requires professional installation, and evaluate how easily you can arm/disarm the system or add new sensors over time.
Subscription Fees and Ongoing Costs
Many security systems charge monthly fees for professional monitoring or cloud storage. These costs can add up over time and impact your total investment. Some systems offer free basic monitoring or local storage, which might suffice for many users. Be sure to factor in these recurring expenses when comparing total costs.
Smart Home Compatibility
If you already use smart home devices, choosing a system that integrates with Alexa, Google Assistant, or other platforms can streamline your setup. Compatibility allows for voice control, automation, and centralized management. However, this often comes with additional costs or complexity, so weigh these benefits against your comfort level with smart tech.
Reliability and Security Features
Opt for systems with encrypted connections and backup options like cellular or GSM communication in case Wi-Fi fails. Reliable sensors that respond quickly and accurately are essential to avoid false alarms or missed detections. Also, consider the system’s battery life and whether it includes backup power sources to remain operational during outages.
Frequently Asked Questions
Can I install a home security system kit myself?
Most modern home security kits are designed for DIY installation, featuring wireless sensors and straightforward setup instructions. Many come with app-based guides that make setup accessible even for those without technical experience. However, larger or more complex systems might benefit from professional installation to ensure optimal coverage and integration, especially if you require extensive wiring or advanced configurations.
Are subscription fees necessary for home security systems?
While some basic systems offer free local alarm and control features, most advanced options, especially those with professional monitoring or cloud storage, require ongoing subscription fees. These fees provide extra security, such as 24/7 monitoring, video storage, and app alerts. It’s important to weigh these recurring costs against the value of added features and peace of mind they provide.
How important is smart home integration in a security kit?
Smart home compatibility can enhance your system’s functionality, allowing you to automate responses, control devices via voice, and receive consolidated alerts. If you already own smart devices, a compatible security kit can create a seamless experience. On the other hand, if simplicity is your priority, a standalone system with basic alarm functions might be preferable to avoid unnecessary complexity.
What should I consider if I have a larger property?
For bigger homes, look for systems that support multiple sensors, cameras, and possibly outdoor units. Coverage is key—ensure the system can be expanded easily and that sensors have reliable wireless connectivity across your property. Investing in a system with a cellular backup option can also prevent blind spots during internet outages, maintaining security at all times.
Is professional monitoring worth the extra cost?
Professional monitoring provides peace of mind, as trained personnel can respond immediately to alarms and alert authorities if needed. This service is especially valuable if you travel frequently or have a larger property where false alarms are less manageable. However, it comes with monthly fees, so weigh the cost against your comfort level and whether local or self-monitoring options meet your security needs.
Conclusion
For most users, the eufy Security 5-Piece Home Alarm Kit offers a balanced combination of ease of use, reliable performance, and affordability, making it the best overall choice. Those on a budget should consider the Ring Alarm 8-Piece Kit for solid features at a lower price. For advanced smart home integration, the Ring Alarm Pro delivers a premium experience, especially for tech enthusiasts. Beginners or renters might prefer simpler, wireless options, while larger homes or properties with specific needs should look toward systems with expandable coverage. Ultimately, your choice should align with your home size, tech preferences, and budget constraints.













