Mini portable alcohol breathing device: alcohol tester police accurate with its high-precision semiconductor alcohol sensor, the breath alcohol tester delivers you the most accurate results and beats alarm when too much alcohol is detected. USB rechargeable and durable: with a USB data cable, the alcohol tester is rechargeable. Police accurate alcohol tester with advanced semiconductor sensor, test your blood alcohol concentration more accurately and faster. Automatic alarm function: alcohol test. If the display is more than 0.050% BAC or 0.500% BAC or 0.250 mg/L (BrAK), the tester emits an alarm. The results are displayed for 5 seconds and then automatically switched off. Thus, the test goes hygienically - you do not need to use the blow pipe (the blow tube can cause bacteria). It will give you a reliable result. 2 units of measurement can be converted (% BAC, g / l). Warning before the LCD display LCD display Blow Blu Ray and portable rear light: ultra-compact design, this portable alcohol respirator is small and lightweight and fits very well in your back pocket. With LCD display to see the result clearly, and with 3 colours to remind you whether the result of the alcohol test is safe or not.