Specifications: response time: ≤15S Measuring range: 0~0.19%BAC 0~1.9g/L Indication error: ±0.01%BAC Blowing continuity test: 5 seconds (Flow: ≥10L/min) Power supply mode: Battery capacity 200mAh Working current: 150mA Display: LCD display Alarm mode: Buzzer Charging mode: USB charging cable Advantages: 1.LCD solored screen Readout you test result correctly with the LCD screen, it can show up the result clearly no matter in dark or under the sun. 2.LED warning When it detects that your body alcohol content exceeds the limit, the LED warning light of the alcohol tester will change from green to red and make a “buzzer” sound to remind you. 3.Lightweight and compact It is lightweight, small, and easy to carry around in your pocket or purse. 4.Long battery life This alcohol tester is powered by rechargeable lithium battery, universal USB charging interface, energy saving, convenient, with USB data cable so that you can always charge in the car or at home.