... : 0.000~2.000mg/L Adjustable Pricing Coin-Operated Breath Alcohol Tester (AT309) General Description:This self-service machine is designed ... , this device has excellent sensitivity and reproducibility. When the alcohol content exceeds the preset alarming level, it will send out ... results are shown by the red, green, and yellow LED indicator lights.Indication Manner: mg/l, mg/100ml, g/l, %BAC ...