Features: 
Manual test , Auto-reset 
Photoelectric sensor 
Sound& flash alarm 
Single sided fiberglass PCB 
High stability to the environment 
High density SMT design,high stability 
Dustproof,mothproof and anti-white light 

Specification: 

Rated voltage: 9VDC 
Static current: ≤10uA 
Alarm current: ≤15mA 
Working temperature: -10ºC~+50ºC 
Humidity: ≤95%RH 
Alarm mode: sound & flash 
Monitoring area: 20 square meter 
Size: 107*35mm 
Execute criterion:GB4715-1993