Features:Intellectualized design, with recording function, can record up to 99 sets of data.Chameleon background lighting, white, green and red, react three different measurement condition.Acoustic-optic alarming, easy to set.Ergonomically body designed, beautiful outlook, nice operate feeling and easy to carry.Measured gas type: natural gas, liquefied petroleum gas, coal gas and other combustible gas, as well as organic solvent volatilization gas of gasoline, alcohol, ketene, etc.Specification:Model: SPD202/ExMeasuring Range: 0-100%LEL, 50-50000ppmResolution: 0.1 %LEL, 10ppmMeasurement Error: 5%Test Result Read Time: 10 secondsBattery: 4 x 1.5V AA battery (NOT included)Detector Body Size: Approx. 16.5*7.3*4cm/6.5*2.9*1.6inchTotal Length: Approx. 52cm/20.5inchWeight: Approx. 675g / 23.8ozMeasurement ConditionBacklightNormalWhiteALA1GreenALA2RedApplications:Gas leakage detecting of city gas.Combustible gas leakage detecting of petrochemical industry.Combustible gas leakage detecting of Shipbuilding industry.Combustible gas leakage detecting of Depot, gas station.Combustible gas leakage detecting of oil tank truck.Combustible gas leakage detecting of fire & rescue industry.Package List:1 * Combustible Gas Detector1 * Plastic Case1 * User Manual