Features and specifications:
1) Can be linked to home security system
2) Housing is made of flame retardant material
3) High quality
4) Alarm threshold:
a) Coal gas: 2,000ppm  30% solid
b) Petroleum: 5,000ppm  30% (LPG)
c) Natural gas: 2,000ppm  30%
5) Response time: < 2sec
6) Resume time: < 5sec
7) Working power: DC 12V
8) Working alarm current: 200mA
9) Working temperature: -10 ~ 50oC
10) Storage temperature: -20 ~ 70oC
11) Relative humidity: < 90Rh
12) Low power indicator

Inner packing:
Box dimensions: 10.5 x 4.5 x 15cm
N.W.: 173.8g