This is a prefessional digital breath alcohol tester. High quality and high accuracy and sensation, can respond in 5sec. With the port to insert mouthpiece. Health and convenience. Features: 1. Use high precision and sensitive semiconductor sensor 2. Large Screen Display, three LED light display 3. 5 test units for your option ( %BAC, BAC or g\/l, mg\/l,mg\/100ml) 4. Loud alarm sounds 5. Auto power off Description: Screen: Red digital display with black screen and 3 LED lights Sensor: Advanced flat surfaced alcohol sensor Warm-up time: Within 10 seconds Respond time: Within 5 seconds Operating temperature range: 5~40 Detection range: 0.000-0.199% BAC \/ 0.00-1.99 BAC \/ 0.00-0.99 mg\/L Digital display results (% BAC \/ BAC \/ mg\/L) Power input: 3V (3 x \