Pocket Design: This breathalyzer is only 2.2 x 3.03 x 0.55 inches inchesultra-portable pocket and very easy to hold and carry. High Accuracy Breath Alcohol Tester: This alcohol breathalyzer adopted a high-precision semiconductor alcohol sensor, read out just only 5 seconds! Digital display: The detector analyzer uses a large digital display and red numbers to indicate at night, giving you professional accuracy for safe driving.It is convenient for you to use this alcohol breath at night. 5 Mouthpieces Replace: Enough! Enough!Enough! How many pieces mouthpieces needed? 1? 2? 3? Yes. We provie more pieces than others, you can , maintain health and hygiene alcohol test. Portable Breathalyzer: It is time to experience personal alcohol tester, requires a breathalyzer that great for wedding, parties, or other activities, ensures your safe driving.