Professional Digital Breathalyzer, Portable Grade Breath Digital Alcohol Tester with 10 Mouthpieces (Breathalyzer)

Operating Instructions:

Wait 20 minutes after you drink, eat or smoke before testing.Failure to wait 20 minutes can give inaccurate BAC readings and harmthe sensor.
Step 1: Insert a mouthpiece into the mouthpiece opening.
Step 2: Press the Power/Mode Select or Button. You will hear a beep and the unit will start to count down from 15 on the DISPLAY and say "Warm up". This warm-up process prepares the sensor.
Step 3: When the count down approaches 2, begin to inhale a deep breath.When the count down reaches zero, you will hear a second beep indicating that you should blow into the mouthpiece. Blow through the mouthpiece until you hear a beep.This may happen at any point during the 10 second count down.
Step 4: Once the sensor has analyzed the breath sample, the estimated BAC value is displayed.

Features:

Auto-calibration & sensor fault self-checking system
Fast response time