High-Efficiency Inner Core Precise Conduction: Using high sensitive semiconductor sensor, the speed is fast and the data is accurate. Filter other impurities, leaving only alcohol, so that there is no place for alcohol to escape Easy Shuttle: One-button operation, easy to use, 22 seconds to complete the detection Blowing Test Eliminate Secondary Pollution: Avoid the growth of bacteria in pipe blowing. no contact with air blowing. more healthy measurement Drunk Reminder "Didi" Alarm: According to the degree of excessive alcohol, there will be different beeps High Definition LCD High Contrast Digital Display: Accurate and sensitive; Three units switching, dear and easy to read, automatic memory default unit in the case of nonpower off Specifications: Product size: 112 x 61 x 29mm Sensor type: Semiconductor Testing range: 00.199% BAC, 0-1.990BAC, 0-0.995mg/L Accuracy: ±0.010% BAC, ±0.100‰BAC, ± 0.050mg/L Temperature: 5°C40°C Humidity: <80%RH Atmospheric pressure: 86Kpa~106Kpa Battery: AAA x 3 (NOT Included)