Features:
1) Unique structure design
2) Infrared photoelectronic sensor
3) Reacts very quickly to visible smoke released by smoldering fire and flaming fire
4) Intelligent MCU processing photoelectronic signals
5) Hush button, Test button
6) Auto-check malfunction; Auto-reset after alarm
7) SMT manufacture technology, reliable stability
8) Suitable for fire alarm in houses, factories, shopping malls, hotels, restaurants, office buildings, teaching buildings, banks, libraries, warehouses, etc...

Specifications:
Power supply: 110V/220V AC + 9V battery;
Sound & flash alarm; Sould volume: More than 85dB/3 meters
Sensitivity: 2.06%/ft
Detecting area: 20 square meter
Dimension: Φ 128*38mm