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Contact SupplierOur dual sensor smoke alarm is independent Photoelectric smoke & heat alarm, main feature:
1.9v Battery operated for this (SR-820DHS) stand alone smoke detector
2.Infraed Photoelectric sensing technology
3.Lower battery indication
4.Loud 85dB audio alarm
5.Instant test button
6.MCU processing
6.Test and hush button
7.57ºC(135ºF)fixed temperature alarm
8.High temperature alarm

