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 concentration Product Name: High Sensitivity Alcohol Tester Accuracy: 0.005% BAC Response time: Less than 5 seconds Warm-up time: 10 seconds Power supply: USB charging port Test range: 0.000~0.199%BAC Blowing time: 10 seconds (usually 3~5 seconds) Colour:B:White Material:ABS Package Contents: 1 x Alcohol Tester 1 x Charging cable 1 x English manual Only 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.