Somke detector
1. Wireless type
2. Voltage:12V DC
3. Current: 10-30 mA
4. Alarm volume : more than 75 dB

Power Source:  12V DC
Operating Current: 10 uA (normal) and 10-30 mA (alarm working)
Sensitivity to smoke : In comply with UL217 & BS5446: Part 1 2000 Kitemark License no. KM 53166 0.81~1.42%/FT
Operating Temperature: -5°C - 50°C
Ambient Humidity : 10% -
Alarm volume : ≥75 dB
Emissionfrequency:315Mhz 
One sensor in 25~40mm space,0.5~2.5m above important equipment.