1. TUYA App remote notification of door and window switch2. Low battery reminder3. Supports intelligent voice control such as , Assistant, IFTTT, etc.4. Alarm management, alarm history query5. Power supply: 1.5v AAA battery*2 (not included)Standby current: Less than 35uAAlarm current: Less than 100mAVolume: 4 (including mute)Sound level: 90dBWireless network: IEEE802.11b/g@ 2.4GHzLow battery: 2.4VWorking temperature: -10-55Colour:WhiteMaterial: ABSPackage Contents:1 x wifi door sensor1 x English manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.