Material: ABS; Size: 82.4mmX24mm Precise value, LED high contrast screen display, easy to read. Detection indicator, 3 kinds of indicator detection at a glance. The alcohol tester is easy to carry in a purse or pocket, on a key chain, or in the car for easy portability. This portable alcohol tester features a digital display, audible alarm and auto shut-off to quickly and accurately find out your alcoholism level in seconds. Drunk alert reminder, no more guessing if you are drunk and driving. Product Name: High Sensitivity Semiconductor Alcohol Sensor Warm-up time: 10 seconds Blowing time: within 10 seconds (generally 3-5 seconds is appropriate) Sensor type: semi conductor type sensor Display screen: LCD liquid crystal display screen (black and white) Shell material: ABS plastic Test range: 0.00-0.19% BAC (0-1.9g/l) Measurement unit: mg/l (BrAC) mg/ml (BAC) Measurement mode: Quick troubleshooting, automatic detection Measurement time: 20 seconds Power supply method: built-in rechargeable polymer lithium battery Using battery: 3.7V 140MAH can continuously measure alcohol for 150 times Power adapter requirements: DC5V 1A Working temperature: 0-45 Preheating time: 10 seconds Blowing time: 10 seconds, required to be greater than 4 seconds Reaction time: less than 5 seconds Working current: 250MA (max) Standby current: less than 20UA