Radiotronics Breathalyzer, High-Accuracy Professional Alcohol Tester for Personal Use, LCD Digital Display Alcohol Tester with 10 Mouthpieces

The breathalyzer uses a semiconductor sensor to accurately measure the alcohol content in the body (black) Steps for usage: Step 1: Insert the mouthpiece into the slot; Step 2: Press and hold the power button for 2 seconds. After the beep, the product is turned on, the screen displays "015" and the countdown starts. Sometimes the product needs to be preheated several times, it will automatically reset and restart the countdown 1-3 times; Step 3: When the countdown reaches zero, the screen displays "BLO" and beeps; Step 4: Blow evenly for 5 seconds until a beeping sound is heard; Step 5: Once the sensor has analyzed the breath sample, the estimated BAC value will be displayed. After displaying the test results for 15 seconds without any operation, it will automatically shut down. Result A : The BAC value is lower than 0.08%BAC, the green LED is on, and there are 3 short beeps; Result B : The BAC value is higher than 0.08%BAC, the red LED light is on, and three long beeps are heard. Note : For more accurate results, test 3 times every 2-3 minutes to get an average. TIPS: 1. Wait at least 20 minutes after drinking, eating, or smoking before taking the test. Failure to do so will result in inaccurate readings and damage to the sensor. 2. A low breathalyzer battery can lead to biased test results. 3. If the device has been used five times in a row, please stop for two minutes before using it to maintain accuracy.