About this item ✽【NOTES】An Aqara Hub is required and sold separately. Requires a secured 2. 4 gigahertz WiFi network connection. The Aqara M2 or M1S Hub can connect up to 128 devices(*use of a repeater such as the Aqara Smart Plug or Aqara Smart Wall Switch(With Neutral) is required). Operating Temperature:0°C～40°C (32°F～104°F),for indoor use. Operating Humidity:0%~95% RH, Non-condensing. 【UNAUTHORIZED ENTRY DETECTION】Whenever the door/window opens unexpectedly, the Aqara Door and Window Sensor will send an alert notification to your phone and activate the local alarm on the Aqara Hub. 【HOME AUTOMATION】Tailor it to your personal needs and simplify your life through smart home automation. Supports schedule, timer, and scenes set through the Aqara Home app to automatically turn your Aqara Smart Wall Switch on and off while you're home or away. 【22MM WIDE GAP ALLOWED】The Aqara Door and Window Sensor works with most types of doors, windows, and other fixtures with similar mechanism, such as drawers, cabinets, and more. 【OVERHEAT PROTECTION】When the wall switch detects high temperature limit, it will automatically turn off the power supply. Input Voltage: 120V, 60Hz; Load Capacity: Max: 600 W; Min 3 W. In addition, If you have any questions, please feel free to contact us. › See more product details