Feature 1HIGH 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) 2HIGH SENSITIVITY: Using sensitive semiconductor sensors, this portable alcohol breath tester gives quick results to determine if you are fit to drive 3ENERGY 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 4EASY 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 5DIGITAL LCD SCREEN: This alcohol breath tester has a large LCD screen with a blue background light, easy to breathe at nightItem Type: Alcohol Breath TesterMaterial: ABS1. Professional airway design2. Blue backlit LCD display3. 3 test units optional for users4. Automatic power saving shutdown function5. Preheating Time: <20S, Reaction Time: <5S6. 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) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Host5 x Mouthpiece1 x Mouthpiece Slot1 x User Manual