Features: Keep the bottom line of safety , and drive to work in the early morhing without a hangover. LCD high-definition digital display precise and easy to read accurate and sensitive, at a glance. Language algorithm, high induction chip, precision chemical sensors, present precise values. Based on high-precision chips and smart sensors, other impurities are filtered and only alcohol is left, and the test is more accurate. Blow detection, quick check, no blowpipe contact required, avoid blowpipe breeding of bacterias, blowing without contact, measurement is healthier. Built-in purification chamber scientific filtering remove air only alcohol, the quality of alcohol is too large to flow downward, impurities are automatically discharged for more accurate detection. Specification: Sensor type: Semiconductor type sensor Display: LCD liquid crystal display (black and white) Test range: 0.00-0.19%BAC(0-1.9g/l) Measurement unit: mg/l (BrAC) mg/ml (BAC) Measurement mode: quick check, automatic detection Measurement time: 20 seconds Power supply mode: built-in rechargeable polymer lithium battery Using battery: 3.7V 140MAH can be tested 150 times continuously Power adapter requirements: DC5V 1A Working temperature: 0-45 Warm-up time: 10 seconds Blowing time: within 10 seconds, more than 4 seconds required Response time: less than 5 seconds Working current: 250MA (max) Standby current: less than 20UA colour: black Material: ABS Package Contents: 1 x Alcohol Tester Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.