Feature: 1. COMPACT AND PORTABLE: The alcohol tester is small and very portable and can be carried around easily. It is designed so that it can be put into your wallet, easy to carry around and take alcohol measurements at any time. 2. SIMPLE AND PRACTICAL: The alcohol tester comes with a clock display and a simple design. Equipped with a dust cover, which is helpful to keep the instrument clean. With red LCD digital display and buzzer sound reminder. 3. ACCURATE AND RELIABLE: The alcohol tester only detects the alcohol content and is not interfered by other functions, so the measurement results are more accurate. 4. LOW POWER CONSUMPTION: The alcohol tester is powered by 2 AAA batteries, which has extremely low power consumption. It also has an automatic shutdown function, when not in use can automatically shut down, saving power. 5. EASY TO USE: Simply turn on the power button, wait for 10 seconds warm up time, then blow evenly for 3‑6 seconds, the result will be displayed on the LCD screen within 5 seconds. If the result is dangerous, the buzzer will sound to alert you. To obtain accurate data, it is recommended to repeat the test a few times at 2‑minute intervals, as the values will vary slightly. In addition, for more accurate results, wait 20 minutes after drinking alcohol before testing as it takes time for the alcohol to enter the bloodstream to affect the accurate values. Specification: Item Type: Alcohol Tester Material: ABS Weight: Approx. 58g / 2oz Battery: 2xAAA Batteries (Excluded) Test Range: 0.000-0.199% BAC ; 0.000-1.990%. BAC ; 0.100mg/l-0.250mg/l Measuring Object: Drivers And Other Dangerous Operators. Package List: 1 x Alcohol Tester 1 x Instruction Manual 5 x Mouthpieces (Including One Inside The Machine)