Welcome to our store! 1. INTEGRATED CLEANING FUNCTION: Portable alcohol tester with an integrated cleaning chamber, filters impurities, and precisely detects alcohol content. 2. THREE-COLOR INDICATION: Alcohol tester features a three-color screen indication design, with total green, yellow, and red colors, for accurate and convenient detection. 3. HANGING HOLE DESIGN: Portable alcohol tester with a hanging hole design, allowing you to tie the string for use, freeing your hands, and offering great convenience. 4. PORTABLE: Rechargeable alcohol tester with a small size and light weight, compact and portable, taking up little space, easy to carry and use. 5. USB CHARGING: Alcohol detector charges via USB and has a long standby time. When the battery is out, it can be charged via USB to continue using. Product Type: Alcohol Tester Material: ABS Battery Voltage: 3.7V Cleaning Time: 10 seconds (usually 3–5 seconds) Heating Time: 10 seconds Response Time: <5 seconds Alcohol Concentration Range: 0.0g/L–1.9g/L (BAC 0.00%–0.19%) Operating Temperature: 5–85℃ Battery Capacity: Li-polymer battery 220 mAh (included) Standby Time: 100 days Gross Weight: 63g/2.2oz 1 x Alcohol Tester 1 x User Manual 1 x USB Cable