Features:

• [24 Hours Intelligent Security]:The smart door window sensor offers round the clock monitoring of your home. Use on doors, windows, cabinets, drawers or anywhere you want to notified when it is opened or closed. Catch every activity and send alert to your Android or Apple phone. It’s easy for you to keep an eye on the security of your house anytime, anywhere.
• [Fast Instant Alerts]: Support 2.4G wifi connection. When it is triggered, such as opened closed or tampered, an instant notification will be reported to your smart phone within 3-10 seconds depends on internet speed. The built-in redial function allow door sensor auto connect to the network after resetting the wifi router.
• [Compatible with Alexa &Google Home]: No Hub required, Simply use your voice to control the connected devices by Amazon Echo or Google Home, It also can perform auto control together with other smart device. .For example, set a scene “Arrive Home”, the sensor on the door that turns on the smart light when you arrive home in evening.
• [Enjoy Smart Life style Easily]: Wide gap performance allow for up to 1 cm when door/window is closed. No obtrusive wire and battery powered (2xAAA battery is not included), able to be installed in any tough situation by 3M mounting tape or screw (included). Monitor critical points of house, garage, stores or office, factory and so on. Furthermore, sharing the device to your family member and tracking the history of sensor activities. 
• [Free APP]:Using Tuya Smart APP or Smart Life APP.

Specifications

Battery: AAA1.5V x 2

Standby current: ≤5uA

Protocol: IEEE 802.11b/g/n Wireless Range: 50m

Operating Temperature: -10℃~ 40℃ (14°F~104°F)

Operating Humidity: 20% ~ 85%

Storage Temperature: -10℃ ~60℃ (14°F ~140°F)

Storage  Humidity: 0% ~ 90%

Standby time:6 - 10 months

Wireless Type : 2.4GHz