Features: 1It is suitable for detecting LPG natural gas and coal gas at home kitchen hotel or restaurant etc 2Designed with MCU intelligent supervise control and SMT chip technology 3The LED numeric display technology can display instant gas leak thickness and give visual &audible alarm 4The gas leakage detector adopts high-quality semiconductor calefaction type sensor which can provide good performance 5Intelligent protection of family safety Specification: Features:It is suitable for detecting LPG natural gas and coal gas at home kitchen hotel or restaurant etc. Designed with MCU intelligent supervise control and SMT chip technology. The LED numeric display technology can display instant gas leak concentration and give visual &audible alarm. The gas leakage detector adopts high-quality semiconductor calefaction type sensor which can provide good performance. Intelligent protection of family safety. Three indicators: POWER STATE ALARM. Specifications: Detecting gas: LPG LNG Coal Natural Gas Working voltage: AC100V~ AC240V Working frequency: 50/60 Hz Rated power: < 2W Alarm concentration: LPG : 0.1 ~ 0.5% LNG: 0.1 ~ 0.3% Coal Natural Gas :0.1~0.5% Alarm volume: 85 db (3 meters from the product) Working environment: -10 ~ 50 relative humidity