Specification:

Operating voltage:1.8V-5V

Backup rechargeable lithium battery:3.7V(300mAh) 

Backup battery lifetime:3 years after full charged

Backup battery full charged time by solar panel:70 hours(normal illumination)

Power consumption:≤10mw

Solar panel output voltage and current(200LUX in door):5.5V,60uA

Solar panel output voltage and current(6000LUX in the sun):7.5V,5mA

Solar panel output current:5mA

Operating frequency:433.92MHZ

Wireless range:1000FT (in the open air)