









🚪 Stay connected, stay secure—no dead zones, just peace of mind.
The YoLink Door Sensor leverages cutting-edge LoRa technology to deliver the world's longest wireless range of 1/4 mile, ensuring coverage even in Wi-Fi dead zones like basements and outbuildings. Powered by low-energy AAA alkaline batteries, it offers an impressive 5-year lifespan. With real-time customizable notifications via smartphone app, SMS, and email, it keeps you instantly informed of door/window activity. Compatible with Alexa and IFTTT through the required YoLink Hub, it integrates seamlessly into your smart home ecosystem. Easy to install with included 3M tape, this sensor is designed for professional-grade home security and convenience.




| Manufacturer | YoSmart |
| Part number | YS7704 |
| Item Weight | 70 g |
| Product Dimensions | 9.4 x 4.7 x 3.3 cm; 70 g |
| Batteries | 2 AAA batteries required. (included) |
| Item model number | YS7704 |
| Color | White |
| Style | 1-Pack without Hub |
| Power source type | Battery Powered |
| Installation Method | Wireless (User-Installable) |
| Temperature Range | 122 Degrees Fahrenheit |
| Plug Profile | Wall Mount |
| Included components | Door Sensor, 3M brand double-sided mounting tape |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| tech_spec_battery_description_toys | Alkaline |
| Battery life | 5 years |
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