High-precision digital breath analyzer With advanced semi-conductor sensor ensures accurate readout in short time.When using alcohol tester for the first time or hasnt been used for a long time, press the power button a few more times to clear the semi-conductor sensor internal excess gas to ensure accurate readings.High sensitivity Make alcohol testers turn off automatically to save power when you have completed the test for 5 seconds.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.With backlight LCD displayMake it much easier for the night display and give you professional accuracy for safe driving.Easy HandlingBreathalyzer just one-button operation, it"s easy to turn the device on and test it in seconds.Portable alcohol breathalyzerSpace saving, lightweight, completely easy to hold and carry everywhere.For more accurate measurement readings: Do NOT smoke or eat within 20 minutes before testing. The test time should be after 3 minutes from the last test.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don& 39;& 39;& 39;& 39;& 39;& 39;& 39;& 39;t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it