AM01 High Precision LCD Screen Breath Blowing Alcohol Concentration Tester USB Charging Non-contact Drunk Driving Breathalyzer Detector ?Compact size, easy to carry and easy to use ?Built-in large capacity battery, USB charging for long time using ?Dust-proof design, non-contact type is more hygienic ?High sensing chip, high precision sensor, accurate readings ?Large LED screen digital display, easy to read, clear values Specification: ?Model: AM01 ?Sensor type: semiconductor sensor ?Display: LCD display ?Shell material: ABS plastic ?Test range: 0.00-0.19%BAC (0-1.9g/l) ?Unit of measurement: mg/l (BrAC) mg/ml (BAC) ?Measuring time: 20 seconds ?Power supply: Built-in rechargeable polymer lithium battery ?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: less than 5 seconds ?Working current: 250MA (max) ?Standby current: less than 20UA Package included: ?1 x Alcohol Tester ?1 x Charging Cable ?1 x English and Chinese User Manual