Features HIGH ACCURACY: Alcohol breath tester is used to measure alcohol concentration in human body, measuring range 0.000-0.199% BAC, 0.000-1.990‰ BAC and 0.000-0.995 mg/L(BrAC) HIGH SENSITIVITY: Using sensitive semiconductor sensors, this portable alcohol breath tester gives quick results to determine if you are fit to drive ENERGY SAVING AND AUTOMATIC SHUTDOWN FUNCTION: Powered by 3 AAA batteries(not included), the alcohol breath tester will automatically shut off 5 seconds after completing the test to save power. Each battery installation can be tested more than 200 times EASY TO USE: This alcohol breath tester is space saving, lightweight, easy to hold and carry. The compact model allow you to carry with you anytime and anywhere, ensuring safe driving after drinking DIGITAL LCD SCREEN: This alcohol breath tester has a large LCD screen with a blue background light, easy to breathe at night Specification: Item Type: Alcohol Breath Tester Material: ABS 1. Professional airway design 2. Blue backlit LCD display 3. 3 test units optional for users 4. Automatic power saving shutdown function 5. Preheating Time: <20S, Reaction Time: <5S 6. Measuring Range: 0.000-0.199% BAC, 0.000-1.990‰ BAC and 0.000-0.995 mg/L(BrAC) 7. Battery: 3 x 1.5V AAA(not included) Package List:1 x Host5 x Mouthpiece1 x Mouthpiece Slot1 x User Manual Package List 1 x Host 5 x Mouthpiece 1 x Mouthpiece Slot 1 x User Manual