1Potable: Contactless alcohol tester easily fit in your purse or pocket, perfect for weddings, parties, banquets or other social events to ensure you drink and drive safely. Just needs a small space to store. 2Accuracy: Drive alcohol test using sensitive semiconductor sensors, you can accurately show the alcohol level in your body. Built in 200mAh rechargeable lithium ion battery, it can provide long service on a single charge. 3Easy Use: Home alcohol detector simple to use, just blow into the device for 10 seconds and the results will be displayed on a bright, easy to read screen. LCD display with different light indicators. 4Blowing Test: Contactless test, shareable use with friends, safety, and health, low use cost without mouthpieces design. Blowing without contact measurement is more hygienic. 5Breath Alcohol Tester: This alcohol detector can respond and recover quickly. It also provides you with a reliable and stable result whenever you test, good for personal, professional, drivers, parties, families in household parties use.