NEO NAS-DS01W Wireless WiFi Realtime LED Door Sensor & Window Sensor

1.Measure the light sensitivity 2.Battery: CR123A x 1 Standby time:2 years 3.Sensitivity distance:7m 4.Wifi distance:45m 5.Free app:Tuyasmart or Smart Life. 6.Support systems: Android and IOS. 7.Product size: Main: 7.1x2.1x2.2cm Small: 4x1.1x1.1cm 8.Packing size: 10x9x5.5cm