Welcome to our store! 1. Built-in Cleaning System: portable alcohol tester with an integrated cleaning chamber, filters impurities, and accurately detects alcohol content. 2. Three-color Indication: alcohol tester features a three-color screen design (green, yellow, and red), ensuring precise and comfortable detection. 3. Hanging Hole Design: portable alcohol tester with a hanging hole design, allowing you to tie the string for use and free your hands. 4. Portable: rechargeable alcohol tester with compact size and lightweight design. It's space-saving and easy to carry and use. 5. USB Charging: alcohol detector charges via USB with a long standby time. When the battery runs out, it can be recharged via USB for continued use. Product Type: Alcohol Tester Material: ABS Battery Voltage: 3.7V Testing 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: 220 mAh (included) Standby Time: 100 days Gross Weight: 63g/2.2oz