1- Small and portable, no blowpipe to avoid secondary pollution, non-contact breathing helps to avoid breeding 2- Quick test and timely results, it only takes 20 seconds from blowing to producing results (10 seconds for preheating, 3-5 seconds for blowing, and within 5 seconds for response)3-LED display Clear reading, high contrast LED display is easy to read with two unit value.4- Red-Orange-Green 3-color indicator shows alcohol concentrationProduct Name: High Sensitivity Alcohol TesterAccuracy: 0.005% BACResponse time: Less than 5 secondsWarm-up time: 10 secondsPower supply: USB charging portTest range: 0.000~0.199%BACBlowing time: 10 seconds (usually 3~5 seconds)Colour:A:blackMaterial:ABSPackage Contents:1 x Alcohol Tester1 x Charging cable1 x English manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.