Tuya Smart WiFi Door Sensor Smart Door Open/Closed Detectors Wifi Window Sensor Smartlife APP Work With Google Home Alexa - Door Sensor-1Pcs Main Features Compatible with Alexa & Google Assistant: Simply use your voice to control the connected devices by Alexa or Google Home. It can also perform auto control together with other smart devices which are compatible with Smart Life. Convenient for you to detect your doors, windows, cabinets, drawers or anywhere you want to notified when it is opened or closed. Enjoy Your Smart Life: When you leave home, it will push notification message to you when the door/window opens or closes, so you can discover the intruder in time. Furthermore, you could share the device to your family members and track the history of sensor activities. Easy to Install: No complicated installation tools are required. The sensor can be installed with double-sided adhesive tape or screws(included) in just a few steps, and download an app "tuya" or "Smart Life" from GooglePlay or App Store to add the device to detect the status of your door/window. Tuya Smart WiFi Door Sensor Specification: App/Platform: Tuya / Smartlife APP Works With: Google assistant and Amazon Alexa OS Support: IOS8.0 / Android4.0 and above Wi-Fi Band: 2.4GHz Battry: AAA*2 Battery (no Included) Wireless distance:Max 30 meters(Empty area) Detecting distance: 20mm Operating Temperature: -10 ~+55 Operating Humidity: Maximum 95%RH