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 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 "AAA" alkaline battery, not included) Net weight: 85g Dimension: 112*60*30mm Package weight: 170g Package size: 164*116*48mm Package included: 1 * Alcohol Tester 1 * Instruction Manual 10 * Mouthpiece 1 * Tester Bag