C-AT108 Alcohol Tester Specifications:Gas Sensor:NM Semiconductor gas sensorDetection Range:0.00-0.20%BAC0.00-1.00mg/L;0.00-2.00g/LAlarming Level:Two level alarming:1st 0.02%BAC,2nd 0.05%BAC.0.12mg/L,0.25mg/L;0.25g/L,0.50g/LWorking Voltage:DC3V (2xAAA batteries) Using Environment:Tem.:0°~45° Relative Hum.<= 95%(No Dews)Alarming Manner:LED. 1st Level: Yellow LED2nd Level:Red LED N.Weight/pcs:50g