Features: High-definition display, precision numerical LED large screen display, Simple reading with Three-color indicator, and clear at a glance. Precision algorithm for removing impurities and retaining alcohol. Alcohol quality automatically removes flowing impurities, only for more accurate detection. USB power supply, built-in high-capacity lithium battery, it can be used about 300 times with one charge. No mouthpiece contact is required. Safer and more hygienicAvoid blowpipe-style bacteria breeding without contact, and the measurement is healthier. Equipped with smart chip, highly sensitive sensor, more accurate measurement. It is recommended to start the test 20 minutes after drinking which is more accurate. Specifications: Model: AM01 Color: Black 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 200MAH can test 300 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: less than 5 seconds Working current: 250MA (max) Standby current: less than 20UA Product Size: 8.2*2.4cm / 3.2*0.9in Product Weight: 20g / 0.7oz Package Size: 10*8.8*2.2cm / 3.9*3.5*0.9in Package Weight: 46g / 1.6oz Package List: 1 * Alcohol Tester 1 * USB Cable 1 * User Manual