Features: Use high precision and sensitive semiconductor sensor, quick response and resume. The breathalyzer test rating is adjustable with 5 common-used units (%BAC, g/l, mg/L, mg/100ml, BAC). Clearly LCD digital display with 3 LED indicator. Loud alarm sounds up once the alcohol concentration is higher than the alarm value. Auto power off, power saving. It is easy to carry, available for friends gathering, company reunions, family reunion, wherever you go, do not drive after drinking. Specifications: Color: Black Material: ABS Range: 0.000-0.199%BAC, 0.000-1.990BAC, 0.000-1.990g/l, 0.000-0.995mg/L(BrAC), 0.00-199mg/100ml Alarming: 0.050%BAC, 0.500BAC, 0.500g/l, 0.250mg/L(BrAC), 50mg/100ml Accuracy: 0.010%BAC, 0.100BAC, 0.05mg/L, 0.100g/l, 10mg Response Time: 5s Warm Up Time: 20s Display: Nixie tube and 3 LCD light reminding Working Electric Current: 120mA Environmental Temperature: -10~50 Power Supply: 3 * 1.5V AAA alkaline battery (NOT included) Item Size: 125 * 68 * 24mm / 4.92 * 2.68 * 0.94in Item Weight: 75g / 2.6oz Package Weight: 130g / 6.6oz Package Size: 14.5 * 11 * 4.5cm / 5.71 * 4.33 * 1.77in Package List: 1 * Alcohol Tester 10 * Mouthpiece 1 * Instruction Manual (English) NOTE: In order to make the test results accurately, please test with the alcohol breathalyzer 20 minutes later after drinking; please wait for another 3 minutes before starting the next test to get the precise testing result.