Police accurate alcohol meter: the alcohol tester with professional airway design and high-precision semiconductor sensor, test your blood alcohol concentration (BAC) more accurately and faster. Test winner with 99.1%, range of 0.00% ~ 1.9% BAC / 0.0 ~ 1.9 g/l. Clear illuminated LCD display shows the test result directly.Easy to use: alcohol tester, simply insert 2 AAA batteries (not included), turn on your alcohol tester. Wait 20 seconds to warm up, then you can start testing. The alcohol tester turns off automatically to save power when no operation is done for 10 seconds.[Acoustic warning]If the BAC result exceeds certain values, this breathalyser makes sounds to inform you so you can make a better judgment. the display is more than 0.050% BAC or 0.500% BAC or 0.250mg/L (BrAK), the tester emits an alarm.Compact and portable: this alcohol tester comes with 14 interchangeable mouthpieces. They can be cleaned and reused, which is good for hygiene. Super compact design, alcohol tester fits in your pocket and is easy to hold and carry wherever you go. Perfect for drivers.Colour: blackMaterial: ABSPackage Contents:1 * Tester4 * NozzleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.