Operating voltage :3v lithium battery Bettery life:10years
Infrared photoelectric sensor
MCU processing,eliminate false alarm,low batter warning
Low power consumption,test and hush button
Shockproof design ,
Dustproof,mothproof,anti-light interference design
Sound & flash alarm,Sound level 85db/3m
Low battery warning ,Test/hush function Tool-Free intallation design
Certifications:CE ROHS FCC