Features Easier Control In the 2.4G network, simply connect your smart door magnetic sensor to the application for convenient control and operation. DOOR OPENING ALARM The window sensor can detect the door opening status, and also allows offset of 5mm and a gap of almost 1cm to ensure high security. Extensive Use Our door window sensor is perfect for garage doors, skylights, safes, cabinets, refrigerator doors, drawers, safes, etc., very useful. Easy to Install 2 pieces of double-sided tape are also included, make sure the surface is clean and dry, and can be pasted on any door or window. Faster alerting: When the status of the protected device changes, you will receive timely alarm notifications from the smartphone application. Specification: Item Type:Door Window Sensor Model: D06. Support Wi-Fi protocol: WIFI 2.4GHz Supported wireless standard: IEEE 802.11b/g/n Operating temperature: 0℃ ~ 40℃. Humidity: 20% - 85% RH Power supply: 2 x AAA battery, can trigger 6000 times. Battery not included. Package list: 1 x large sensor. 1 x small sensor. 1 x user manual (English language not guaranteed). 2 x double-sided tape. 4 x screws. 4 x wall plugs Package List 1 x Large Sensor 1 x Small Sensor 1 x User Manual 2 x Double Sided Tape 4 x Screw 4 x Wall Plug