SwitchBot Contact Sensor
SwitchBot Contact Sensors is made up of two components that are fixed close to each other on things such as doors and windows. With a detection range of up to 16.4 ft (5m), 90° horizontally, and 55° vertically, any movements that your door or window makes can be detected to help notify you when contact takes place. Just simply align the magnet area with the bottom of SwitchBot Contact Sensor’s main body, and you’re good to go.

Material: ABS with Anti-UV coating
Compatibility: Android 5.0+, iOS 11.0+
Working Environment: -10°C~60°C / 20-85%RH14ºF~140ºF
Power Input: Battery: AAA x 2
Battery Life: Typically 3 years, triggered 80 times by door open, 80 times by door close, 40 times by button press, 40 times by light sensing, and 20 times by local scenes under 77ºF (25ºC) on a daily basis
BLE: ≥5.0 (Long Range)
Bluetooth Range:80m/120m feet line of sight under ideal conditions with no obstructions.
Third-party Services: Alexa, Google Assistant, IFTTT