[High precision and high sensitivity] This alcohol tester is used to measure the alcohol concentration in the human body. It uses a sensitive semiconductor sensor and can quickly give results in just 5 seconds to determine whether you can drive. Provides high-precision test results. [Small and portable design] This British alcohol tester saves space, is lightweight and easy to carry. Pocket size, convenient for you to carry anytime, anywhere, to ensure your safety when driving after drinking. [Easy to use] Just press the switch of the alcohol tester, the instrument will display a countdown from 10 to 0 and enter the test mode. Blow into the blowing hole for 3-5 seconds, and then read the test results from the alcohol tester display. The British digital alcohol tester has an audible alarm, and the alcohol tester will sound a buzzer alarm if you drive after drinking. [Power saving] The breath alcohol tester is powered by 2 AAA batteries (not included). It automatically sleeps 35 seconds after the test. Automatic shutdown design, energy saving and power saving. 【Portable non-contact alcohol tester】The UK breath alcohol tester adopts a safe non-contact design to ensure fast, reliable and accurate test results. At the same time, there is no need to touch the device, just blow close to the alcohol tester, and the test process is very hygienic. 【Note】For more accurate results, please read the instructions and product details page carefully before use. Note: For more accurate results, please take the average value after 3 consecutive tests.