Compatible with Alexa & Google Home: Just use your voice to control the connected devices through Alexa or Google Home. It can also perform auto control along with other smart devices compatible with Smart Life. Convenient for you to detect your doors, windows, cabinets, drawers or anywhere you want 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 detect the intruder in time. Moreover, you could share the device to your family members and track the history of sensor activities. Easy to Install: No complicated installation tools required. The sensor can be installed with double-sided tape or screws (included) in just a few steps, and download an app "tuya" or "Smart Life" from GooglePlay or App Store to check the status of your door / window. Specifications: Input voltage:DC3V LR03 Quiescent Current:10uA Alarm Current:160mA Low power undervoltage:2.7V WiFi:802.11b/g/n Magnetic control distance:15mm Working temperature:-10-50 Working humidity:max 95%RH Package Included: 1*Sensor 1*Instruction