Features: Three kinds of alcohol measurement unit conversion (BAC/mg/L/BAC%) Digital alcohol tester with sound alert. Backlit LCD display for easy reading. Quick response and resume. Specially designed for safe driving. Easy detection and accurate. Small and portable, easy to carry. Features: Detection range: 0.000-0.199% BAC and 0.000-1.990BAC and 0.000-0.995mg/l Sensor: Advanced semiconductor oxide-based alcohol sensor Warm-up time: Within 10 seconds Response time: Within 5 seconds Operating temperature: 5C ~ 40C Power source: 2 * AAA batteries (not included) Item Size: 775614mm Black Color Package Includes: 1 x Handheld Alcohol Tester digital Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Due to different personal measurement techniques, there may be 1-3mm physical error. Thanks