Features: 1.Noncontact Design: Noncontact blowing detection is safe and more hygienic, allows multiple persons to use without extra mouthpiece replaced. 2.High Accuracy: Alcohol tester adopts high accuracy and sensitive semiconductor alcohol sensor, generating accurate results. 3.USB Rechargeable: Built in 140mAh polymer battery, can be used for 300 times, very durable, and USB rechargeable. 4.Portable: Breath alcohol tester is very small and portable, can be easily carried in your wallet or pocket, convenient and practical. 5.Application: Breathalyzer is suitable for wedding, parties, feast or other social activities to ensure safe driving after drinking. specification:Item Type: Alcohol Tester Material: ABS Color: Black Function: Breathalyzer test Built-in Battery: Polymer lithium ion Battery Capacity: 140mAh Detection Range: 0.00-0.19% BAC (0-1.9G/L) Detection Error: 0.005% BAC Detection Unit: mg/L (BrAC); Mg/ml (BAC) PackageList:1 x AlcoholTester 1 xUSB Cable 1 x User Manual