Features: 100% brand new and high quality Lightweight and compact, easy to carry. The micro-matte process, delicate touch, can't put it down. Two detection modes to meet the needs of different occasions: precise mode-need to install blowpipes, the detection is more accurate (5 blowpipes are given); quick check-no blowpipe is required, suitable for multiple people to use, quickly check whether there is alcohol or not. Equipped with smart chips and highly sensitive sensors, the measurement is more accurate. Accurate numerical values, high-definition large-screen display, clear at a glance. USB rechargeable lithium battery, without frequent battery replacement, can be recharged. Specification: Display: Adopt dazzling green light 2.0 inch display Detection range: 0.00~400mg/100ml Detection accuracy: 10% (mg/100ml) Warm-up time: 10 seconds Induction time: 5 seconds Alarm function: when the alcohol content exceeds the limit, the red light on the upper left will indicate, and the buzzer will automatically alarm Power supply battery: 3.7V/200mAh rechargeable lithium battery Interface: Micro-USB (5V/1A charging) Material:ABS Size:Approx.3.5x13.5x4.1cm/x1.38x5.31x1.61inches Color:Black Package Includes: 1x Alcohol Breath Tester 1x Instruction Manual