Features:

Battery Operated or ACpower

Comply with BS EN54-4UL539

Photoelectric sensingtechnology

Low battery warning

Loud 85dB alarm

Instant test button

Interconnectability

57°C(135°F)Fixed rate

Technical:

Operating voltage: 9Vbattery

Horn output: 85dB at10ft

Temperature range:-10°C~ 70°C

Humidity range: 5%~95%relative humidity (RH)

Smoke alarm point:2.06%/ft

Alarm temperature:57°C(135° F)

Dimension:124mm(Dia)*40mm(Hs)