High Sensitivity Digital Alcohol TesterHigh Sensitivity and advanced semiconductor technology, this breathalyzer is precise to the within a hundredth of a percent.Please test after drinking for at least 20 minutes because it takes about 20 minutes for the alcohol to be absorbed from the digestive into the bloodstream. If testing immediately, it can only reflect the alcohol concentration in the oral cavity, not in the blood.Accurate Measurement ReadingsNight Display and give you professional accuracy for safe driving. For more accurate measurement readings,Please Do NOT smoke or eat within 20 minutes before testing or The test time should be after 3 minutes from the last test.Easy to operateOur professional breathalyzer is overwhelmingly easy to use. Breathalyzer just one-button operation, it's easy to turn the device on and test it in seconds.(3 AAA batteries not included)Portable Alcohol BreathalyzerSpace saving, lightweight, completely easy to hold and carry everywhere.Perfect After-Sales Service: If you are not satisfied with this breathalyzer, you are welcome to contact us at any time and put forward your valuable opinions. Your satisfaction is our greatest motivation.This portable breathalyzer is easy to use, operating on a single button, simply blow into the folding mouthpiece for an accurate BAC reading in seconds. Come with 5 pieces of the mouthpiece and 1 cloth bag, allow you to test multiple individuals in a sanitary fashion and you can carry it to anywhere. Great for wedding, parties, feast or other social activities.Breathalyzer Specifications:Sensor:high-precision semiconductor alcoohol sensorProduct dimensions (L * W * H): 4.37 x 2.4 x 1.14 inchesDetection range: 0.000% -0.199% BAC; 0.000-0.995mg / lAlert Level: (Optional) 0.050% BAC; 0.500 BAC; 0.250 mg / l; 50mg / 101mlWarm-up time: Response time: Screen:blue backlight 3-digit LCD screenEasy To Use:Step 1. Fully charged the alcohol tester and turn on with one button.Step 2. When its flashing, please wait for 20 seconds.Step 3. 'Warm up' appears with a beep sound, and then please start to blow.Step 4. Review the results.Warm Tips:1.If you haven't used it for 15 days, please open it 3 times before using it next time.2.Do not drink or eat for 20 minutes before the test.3.Please blow within 5 seconds after warm up for 20 seconds.4.Please blow evenly to avoid saliva entering the breathalyzer, causing damage to the alcohol tester.5. Please blow 3 times in a row and take the median to obtain accurate test results. The results are only for reference and should not be considered as reasons for drinking and driving.Package Include1 x Alcohol Tester5 x Mouthpieces