Features:
1. Digital alcohol tester with audible alert.
2. Range:0.00-0.19% BAC & 0.0-1.9 g/l.
3. Quick response and resume.
4. Auto power off.
5. Use mouthpiece.
6. Key chain.
7. Use 2x"AAA"alkaline batteries(not included).
How to use the alcohol tester.
Warm up:
1. Press and hold the power button for 1 second, the alcohol tester LCD will turn on with one beep sound.
2. The "warm up" symbol is displayed, and the 10 to 00 countdown is started that indicate the tester is in warm-up mode.