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By certification 
Specification
Worry-free! 10-year battery life
Advanced photoelectric sensing technology offers high sensitivity
Auto-check malfunction, low battery warning
Manual test & auto-reset, anti-RFI (20V/M-1GHz)
Dust-proof, moth-proof & anti-visible light
Technical Data
Sensor Type |
Photoelectric smoke sensor |
Operating Voltage |
3.0 V DC |
Battery Type |
3.0 V lithium battery |
Standby Current |
BAT1< 6 uA; BAT2< 6 uA (The average static current is less than 6 uA during a 10-minute test.) |
Alarm Current |
BAT1< 5 mA; BAT2< 60 mA |
Audibility Level |
> 85 dB @ 3 m |
Operating Ambient Temperature |
32 to 104 °F (0 to 40 °C) |
Operating Relative Humidity |
≤ 95% (non-condensing) |
Safety Standards |
EN 14604 |
Product Life |
10 years |
Photos
http://www.smoke-detector.com/
