1LCD HIGH DEFINITION DIGITAL DISPLAY: Portable alcohol tester adopts LCD high definition digital display, accurate value is clear and easy to read, accurate and sensitive. 2HIGH ACCURACY: Mini alcohol tester adopts C language algorithm with high sensing chip and precise chemical sensor, presenting accurate values, filtering other impurities and leaving only alcohol, testing more accurate. 3SCIENTIFIC FILTRATION: Portable alcohol tester built in purification chamber, scientific filtration, exclude the air and only leave the alcohol, alcohol mass bias downward flow, impurities automatically discharged only for more accurate testing. 4BATTERY POWERED: Portable breath alcohol tester is battery powered, portable and easy to replace, powered by three AAA batteries(battery not included), replaceable at any time, more convenient. 5WIDE RANGE OF SCENES: Portable alcohol tester is suitable for overnight drinking, preparing for driving, bars, KTV, family gatherings, company annual meetings and other scenes.