1.Available for Natural gas, LPG, etc. 2.Alarm level: 10%±5%LEL, 3.Wall mounted;easy to install. 4.Auto reset. 5.MCU Processing adopted, 6.Malfunction auto-check indicator, 7.SMT manufacture technology,High stability. 8.Alarm output:Relay output/Sound&Flash alarm; 9.Operating voltage: AC110V or AC220V;Static current: ≤90mA, Alarm current: ≤100mA. 10.Rated power: less than 3W; 11.Sound level: ≧85db (within 3 meter). 12.Execute Criterion:GB15322;EN50194;UL1484, 13.Dimension:110*70*40mm