This alcohol tester is designed for and aid to promote reasonable driving. It should not be used in anticipation of the use or operation of vehicles， machinery， or equipment.Features:Use high precision and sensitive semiconductor sensor.2.0' lattice black screen with red digital display.Three test units (%BAC， ‰BAC， mg/L) to be selected.Quick response and resume.Three LED display simultaneously.Loud alarm sounds.Auto power off.Mini， light and handy， convenient to carry with drivers.Specifications:Color: BlackMaterial: ABSRange: 0.000-0.199% BAC， 0.000-1.990‰BAC， 0.000-0.995mg/LAccuracy: ±0.01% BAC at 0.05% BACPower Input: 3×1.5V "AAA" Alkaline Battery (Battery is not included.)Item Size: Approx 12.5 * 6.8 * 2.4cm / 4.9 * 2.7 * 0.9in (L * W * H)Item Weight: Approx 74.1g / 2.6ozPackage Size: 16.9 * 8.2 * 2.8cm / 6.6 * 3.2 * 1.1inPackage Weight: 187g / 6.6ozPackage List:1 * Alcohol Tester1 * Instruction Manual5 * Mouthpiece1 * Tester Bag