Feature:1. BUILT IN PURIFICATION BIN: Portable breath alcohol tester built in purification bin, filtering impurities, accurate detection of alcohol content.2. THREE COLOR INDICATION: Alcohol tester adopts the screen three color indication design, a total of green, yellow and red three colors, accurate and convenient detection.3. HANGING HOLE DESIGN: Portable alcohol tester with hanging hole design, you can tie the lanyard to use, free your hands, very convenient.4. PORTABLE: Rechargeable alcohol tester small size and light weight, compact and portable, will not occupy too much space, easy to carry and use.5. USB CHARGING: Alcohol detector is charged by USB and has a long standby time, when the power is used up, it can be charged via USB to continue using.Specification:Item Type: Alcohol TesterMaterial: ABSBattery Voltage: 3.7VBlowing Time: 10 Seconds ( Generally 35 Seconds Can Be)Preheat Time: 10 SecondsResponse Time: <5 SecondsAlcohol Concentration Range: 0.0g/L1.9g/L (BAC 0.00%0.19%)Working Temperature: 585Battery Capacity: Li Polymer Battery 220mah ( Included)Standby Time: 100 DayGross Weight: 63g/2.2oz.Package List:1 x Alcohol Tester1 x Instruction Manual1 x Power Cord