Portable Alcohol Tester, Breath Alcohol Tester, Breath Home Appliances This product does not contain batteries Product introduction: digital display of alcohol concentration results, prompt tone; quick response and recovery; optional alarm point; red backlight; automatic shutdown and power saving function; replaceable mouthpiece, distributed with 5 mouthpieces Product size: 1187028mm Open the detector back cover and install 2 AAA alkaline batteries. Using high-sensitivity semiconductors, the data is accurate and fast. LED backlight digital display, more convenient to observe at night EASY TO OPERATE AND PORTABLE: Easy to operate, easy to carry, small and exquisite in appearance, save space for you, you can put it in your pocket or bag when gathering with friends, and take it with you when traveling safely. Sensitive buttons that can be turned on and off with just one touch. The blood alcohol level will automatically turn off after 10 seconds of display. In order to achieve more accurate test results, it is recommended that users can repeat the test 2 to 3 times. Note: When the tester is taken out of the package for the first time or if the tester is not used for a long time, the sensor surface will be oxidized, and the user needs to preheat the product several times before performing the alcohol test The air nozzle is healthy and environmentally friendly, safe and non-toxic; streamlined handle design, beautiful streamlined design, beautiful hand feel