Features: Lightweight and compact, easy to carry. Equipped with-smart chips and highly sensitive sensors, the measurement is-more accurate. Accurate numerical values, high-definition screen display, clear at a-glance. Quickly estimate your blood alcohol concentration with this small alcohol breathalyzer. Applicable to driving and dangerous work. Easy and Convenient to use. Specifications: Material:ABS Size:Approx.10.5x3.2x1.6cm/4.13x1.25x0.62inch Color:White/Black Model No:H10 Function: alcohol contraction detection Display: liquid crystal display Sensor: semiconductor alcohol sensor Charging input: 5 v/1A Preheating time: 10s Reaction time: 10s Measuring range: 0-0.19% BAC, 0-0.95mg/LBrAC. Package Includes: 1x Alcohol Breath Tester 1x Instruction Manual note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.