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Contact Supplier1.The SR-820PHS is Photoelectric Smoke detector alarm (independent) with 9v battery operated
2.Infrared photoelectric sensor
3.MCU processing, eliminate false alarm
4.Photoelectric sensing technology
5.Dustproof, mothproof, anti-light interference design
6.Hush function and Auto-check malfunction
7.Lower battery indication
8.Execute criterion: EN14606; UL217

