Features 1、Basic Parameters: The alcohol tester has an operating time of 10s warm up, a response of &lt;5s and a test range of 0.00%‑0.19% BAC (0.0‑1.9g/L). 2、Lightweight and Compact: Made from excellent ABS material, this alcohol tester is compact and convenient, with a blowing design for quick response and recovery with selectable alarm points. 3、Automatic Switch Off: This alcohol tester provides a digital display of alcohol concentration results with a beep and an automatic switch off function to save power. 4、Complete with 5 Mouthpieces: This alcohol tester has interchangeable mouthpieces and comes with 5 mouthpieces to ensure that the device is always hygienic and ready to use when you need it. 5、Easy to Carry: This alcohol tester can be carried around with you. Perfect for drivers, law enforcement officers and anyone who wants to make sure they drive or work safely. Specification Item Type: Alcohol Tester Material: ABS Two Unit Display: %BAC and g/L Battery: 2 x 1.5V AAA alkaline batteries (not included) Sensor: High sensitivity semiconductor alcohol sensor Testing Range: 0.00 to 0.19% BAC (0.1 to 1.9g/L) Alcohol Content: -0.01 to +0.02% BAC (0.05% BAC alarm point) Pre Warming Time: 10 seconds Response time: <5 seconds Auto Shut off: Supported Size: Approx. 118 x 70 x 28mm / 4.65 x 2.76 x 1.1i Package List 1 x Alcohol Tester 5 x Test Mouthpiece (one on the tester) 1 x Instruction Manual