◆ Battery:AAA1.5V*2
◆ Low-battery detection
◆ Built-in battery
◆ Detece open/close status of the door/window
◆ Support all Smart-HL product Linkage control

Standard Package:
1x WiFi Door sensor
2x AAA1.5V battery
1x Double-sided tape

Box: 8.5*5.5*2.5cm
Unit weight: 0.05kg