Sonoff DW2-WiFi Wireless Smart Door/Window Sensor, Smart home, Bluetooth pairing

Sonoff DW2-WiFi is a wireless door and window sensor through a magnet and the transmitter is separated to trigger the transmitter. The transmitter sends a trigger message to the App in time when the window or door status is detected. It is an excellent choice for monitoring home security in time or interacting with smart appliances in the home.