Wireless Magnetic Contact Solar-powered door switch

Door magnetic contact wireless solar-powered indoor usage
No need to change battery within 2-5 years.
Very low standby current consumption
FSK with hopping frequency wireless transmitting and no false alarm
With self check and fault report function.

Technology:
solar panel: 5V
working current: <=0.01mA
Frequency: 433MHz with hopping frequency
backup battery: 3.6V 2000mAh lithium battery
wireless transmission distance: 300 m at open area
Working temperature: -30~70C
Dimension: 79*36*21mm