Professional -precision sensorEK300 alcohol tester is the latest version of 2024, upgraded with version 4.0 sensor to ensure more accurate measurement results. It has been unanimously recognized by experts, engineers and individuals, and has FDA, CE and ROSI certification certificates. After drinking, maybe you need an alcohol tester that can be your good partner.Powerful functions1. Record 20 test records; 2. Quick test results within 5 seconds; 3. Accurate to 3 decimal places; 4. Automatically shut down when not in use.Easy operationAfter turning on, wait for 20 seconds of warm-up time, and then start blowing for 3-5 seconds to get the result. When the test result is er than 0.050% BAC or 0.500 BAC, a "beep beep..." alarm will be issued to remind you and display red.Portable and Replaceable MouthpiecesThe alcohol tester is very light and small, only 50 grams, easy to put in a purse or pocket, and comes with 3 replaceable mouthpieces; the mouthpieces are made of edible PP, washable and reusable; the alcohol tester is very suitable for pockets, backpacks, cars and other places to ensure safe driving after drinking;Package Included: 1*Alcohol Tester, 3*Replaceable Mouthpieces, 1*Instruction Manual.