Package Dimensions:13.9 x 9.2 x 3 cm; 80 Grams Item Weight:80 g This alcohol concentration detection instrument has a sensitive semiconductor sensor, which is sensitive and accurate, and can respond quickly. The LED high-definition display can accurately and quickly test your blood alcohol concentration. The mouthpiece can be reused after cleaning. Buy once and use it many times. Very money-saving. Automatically shut down 10 seconds after the test is over, saving power. Breathing in with a suction nozzle, the measurement is safer. It is very suitable for your family or friends to test. When the measuring instrument is taken out of the package for the first time or has not been used for a long time, oxidation will occur on the measuring instrument. In order to ensure the authenticity of the data, please prolong the warm- up time before use. Specification Display: Clear illuminated LCD display Range: 0.00%-0.19% BAC (0.0-1.9g/l) Blowing time: 3~5s Power input: 2 x AAA batteries (not included) Operating time: warm up: 10s, response: