Features: 1COMPACT 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. 2SIMPLE 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. 3ACCURATE AND RELIABLE: The alcohol tester only detects the alcohol content and is not interfered by other functions so the measurement results are more accurate. 4LOW 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. 5EASY TO USE: Simply turn on the power button wait for 10 seconds warm up time then blow evenly for 36 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 2minute 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 TesterMaterial: ABSWeight: Approx. 58g / 2ozBattery: 2xAAA Batteries (Excluded)Test Range: 0.000-0.199% BAC ; 0.000-1.990%. BAC ; 0.100mg/l-0.250mg/lMeasuring Object: Drivers And Other Dangerous Operators Package List: 1 x Alcohol Tester1 x Instruction Manual5 x Mouthpieces (Including One Inside The Machine)