Product description:
-power: 9v battery, 12V-25DC

Features:
- Ceiling or wall mounting
- Easy to install with mounting hardware included
- 9 Volt battery operated (included)
- Suitable for any room
- Flash alarm indicator (red)
- Test button for easy recommended monthly testing
- Low battery signal
- Safety clip feature, not allow mounting of smoke alarm
Without battery installed
- photoelectric chamber for early detection from all directions
- Loud 85dB alarm signal

Specifications:
Power Source: 9V battery
Operating Current: 10 uA (normal) and 20-50 mA
(alarm working)
Sensitivity to smoke: In comply with UL217 &
BS5446: Part 1 2000
Kite mark License no. KM 53166.
0.81~1.42%/FT
Operating Temperature: 40oF - 100oF (4.4C - 37.8oC)
Ambient Humidity: 10% - 90%.
Horn Level: 85 Decibels at 10 feet.
Battery life: 1 year min L
5. Interconnecting Gas detector
(1)Circuit for normally closed rely contacts
(2)Circuit for normally opened rely contacts
(3)Operating Frequency: 433 MHz/315MHz (optional)
6. Size: 105mm*25mm
7. Weight: 150g/PCS
8. Package size: 58.5cm*42.5cm*30.6cm
9. Quantity/Box: 80PCS
10. CtnWei(kg): 15.5kg
11. Q`CTY/20`FT: 339200PCS