Original Xiaomi Mijia smart door & windows sensor for daily security Security mode If someone broke into, the alert will remind & taking video, keep yourself & your property safety & security Automatic lights function When you open the door, the light automatically turn on Doors & Windows Sensor + Air Purifier When connect to air purifier, open the window to ventilate early morning, purifier auto standby Small size, easy to install Brand: Xiaomi
Colour: White Type: Other Response Time: 15ms Maximum Installation Distance: 22mm Battery Type: Button Note: This item must match the Xiaomi multifunctional gateway to use Net Weight: 14 g / 0.49 oz