Wireless rolling shutter garage door magnetic contact

MD-212R meian tech FOCUS wireless rolling door contact for garage security.
Smart home wireless security system.
Functions and Specification:
1.Micro-power dedicated CPU
2.Low battery checking circuit, the LED will ON when low battery
3.Send report when shutter door is not closed.
4.Starting control distance: <=60mm
5.Power supply: 1pc CR123A 3.0V Lithium battery
6.Low voltage warning: The battery LED will be on when the voltage is low
7.Frequency:433MHz
8.Transmitting distance: 200m (open area)
9.Transmitter dimension:80*32*25mm, magnetic strip:74*12*20mm