Alcohol tester, digital alcohol tester, fuel cell alcohol sensor.  Healthy anti-return mouthpieces              Fashioned colorized LCD indicationi Real temperature and time indication         Automatic procedures for sampling, simple operation and calibration by user Password management                         Passive testing available Printer and computer communication optionalSensor : Fuel cell Alcohol sensor    Power: 2×AA batteries, rating capacity: 2.1AH, Working Tem: -10°C~50°C; Storage Tem: -40°C~70°C Detection Range: 0.000 ~0.500%;0.000 ~5.000‰;0.000 ~2.500mg/l Accuracy: