PORTABLE GAS DETECTOR FOR THE FLAMMABLE GASES , THE POISonOUS GASES DETECTING SCOPE:0-100% LEL PRECISION DEGREE:_+3%FS REACTING TIME: 30 SECONDS; 60 SEConDS FOR POISonOUS GASES RECOVERY TIME :<30 SECONDS; 60SEConDS FOR POISonOUS GASES WARNING METHOD: SIGNAL AND LIGHT;LED GAS THICKNESS WORKING TEMPERATURE:-40-- +70 CENTIGRADE RELATIVE HUMIDITY:20%-35%RH, FOR POISonOUS GASES 20%--95% ConTINUOUS WORKING DURATION:> 8 HOURS; FOR POISonOUS GASES 100 HOURS POWER SOURCE 3.7V NI BATTERY(WITH EXTRA CHARGER).