1、BLOW IN TYPE: It is a blow in alcohol tester without a mouthpiece, which is more hygienic to use. Users do not need to use the mouthpiece, just blow to test, convenient and quick. 2、SAFE MATERIAL: This portable blow in alcohol tester is made of ABS material, which is lightweight, safe and reliable, and can be used for a long time without easy damage. 3、PORTABLE AND WIDELY USED: Exquisite and compact design, easy to carry, can be placed anywhere in the car, ideal for outdoor activities, weddings, parties, bars and other occasions. 4、HIGH ACCURACY TEST: Adopts high accuracy semiconductor alcohol sensor to measure user's BAC in order to avoid overdrinking. The third generation high sensitivity aluminum sensor smart chip and sensor have good anti interference to ensure accuracy and stability, and accurate detection within 5 seconds. 5、EASY TO USE: Simply plug the alcohol tester into your cell phone (Type C port), open the APP, wait for 15 seconds to warm up, then blow for 5 seconds and the test result will be displayed on the APP. You can know your first 10 tests with this professional grade alcohol tester. For accurate results, wait 25 minutes after drinking alcohol before testing. Item Type: Alcohol Tester Material: ABS Color: Black Port: Type C Working Current: ≤24mA (5V) Measuring Range: 0-200BAC (mg/100ml) Product Size: Approx. 5.6x3.6x1cm / 2.2x1.4x0.4in 1 x Alcohol Tester 1 x Instruction Manual