Make your home smarter with Original Xiaomi Mijia door / window sensor. Connect Smart Sensor to your smartphone, attach it to the window and you can turn air purifier off when the window is open. Or attach sensor to the door, link it to the lamp and every time the door is opened the lamp will automatically turn on.
The sensor has guard mode as well: it will inform you if anyone breaks into.
Deal price: $8.66
Original price: $20
Buy at JOYBUY