[Accurate Testing ]:The breathalyzer uses an ultra-precision semiconductor gas sensor to accurately feedback your actual situation on the LCD display.Unlike traditional mouth contact testing,our non-contact blow-out test eliminates the need for frequent replacement of the breath tester for suction cleaning and avoids cross-infection.Preheat for 10 seconds and finish blowing.Measuring range:0.0-0.99mg/L

[Simple operation]: Long press the power button for 2 seconds, after the 10-second preheating time is completed, please blow from the front to the mouthpiece at 2-3cm away from the mouthpiece and stop blowing after more than 3 seconds (do not touch orinclude blowing in the mouth).Wait a few seconds to display and voice broadcast the measurement results

[Three-color indicator high-precision breath alcohol tester]: Drunk driving: refers to the driving behavior of the driver of a vehicle with a blood alcohol content ≥0.02% BAC and a blood alcohol content <0.08% BAC. The yellow light was on and the alarm sounded quickly. Drunk driving: refers to the driving behavior of the driver of a vehicle with a blood alcohol content ≥0.08% BAC. The red light was on and the alarm went off quickly