Feature: High-definition display, large-screen precision digital LED display, three-color reading, clear at a glance. Sophisticated algorithm removes impurities and preserves alcohol. The quality of alcohol automatically removes flowing impurities, just for more accurate detection. USB power supply, built-in large-capacity lithium battery, it can be used about 300 times on a single charge. No need to touch the mouthpiece. Safer and healthier to prevent the blowpipe bacteria from multiplying without contact, and the measurement is healthier. Equipped with smart chips and highly sensitive sensors, the measurement is more accurate. It is recommended to start the test 20 minutes after drinking, which is more accurate. This alcohol tester has a compact appearance and can be carried with you. It can be carried in your bag or in the car without touching the mouthpiece. It is a must-have artifact at home through exhaled breath detection. Specification: Regulatory model: AM01 Sensor type: semiconductor sensor Display: LCD liquid crystal display (black and white) Shell material: ABS plastic Test range: 0.00-0.19%BAC (0-1.9g/l) Unit of measurement: mg/l (BrAC) mg/ml (BAC) Measurement mode: quick investigation, automatic detection Measuring time: 20 seconds Power supply: Built-in rechargeable polymer lithium battery Use battery: 3.7V 140MAH can test 150 times continuously Power adapter requirements: DC5V 1A Working temperature: 0-45 Warm-up time: 10 seconds Blowing time: within 10 seconds, the requirement is greater than 4 seconds Response time: le than 5 seconds Working current: 250MA (max) Standby current: le than 20UA Packing size: 100*78*22mm Package weight: 46g Color box (main unit, charging cable, manual)