Function: 1. Digital alcohol tester with 0.01% BAC (0.1g/l) increment for reading 2. Detect range: 0.00~0.19% BAC & 0.0~1.9g/l 3. Alert level calibrated 4. Quick response and resume 5. Auto power off 6. Lanyard 7. Use 2?AAA alkaline batteries (not included)