1.One-click quick addition of devices,supports intelligent linkage with other devices,easy installation and use,long standby time. 2.Detect light in the environment,support custom lighting intervals and intelligent linkage devices.Use in multiple scenarios. 3.High-sensitivity infrared detection detector,more accurate detection. 4.Adopt airflow suppression technology to avoid false alarms in complex environments. 5.Quickly detect human movement to avoid detection delays and omissions. APP name: Smart Life/Tuya Smart (need to be used with a gateway) Wireless protocol: Zigbee 3.0 Sensing range: equal 135° Sensing distance: equal 10m Standby current: less than equal 12uA Working voltage: 3V Battery type: CR2450 Standby time: equal 12 months Working temperature: -10-55℃ Working humidity: 0%-99%RH Wireless distance: equal 100 meters (open distance) Colour:White Material:ABS Package Contents: 4 x sensor 4 x adhesive sticker 4 x Rear lid opener 4 x Mesh needle 2 x Chinese and English instruction manual Only 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.