Feature: 1. 3 Status Lights: Portable alcohol detector has three status lights, green light means no drinking, yellow light means drunk driving, red light means drunk driving. 2. High Accuracy: Alcohol detector is a high sensitivity alcohol measuring instrument with high accuracy. 3. Hygienic Nozzle: Accurate alcohol breathalyzer does not use traditional suction nozzles, it is clean and hygienic and can be used with confidence. 4. Recycling Durable: The alcoholic detector has a built in 200mAh lithium battery, which can be recycled for 150 consecutive measurements. 5. Small Portable: The alcohol tester has a built in purification chamber and is small and portable, making it easy to use when going out. How to Use: Press and hold the power button to turn it on, preheat for 10S, and blow airflow into the test port to detect the alcohol content. Specification: Item Type: Portable Alcohol Detector Product Material: ABS Battery Parameters: Lithium ion Battery (Included) Battery Capacity: 200mAh Test Range: 0.00 to 0.19%BAC(0 to 1.9g/l) Preheating Time: 10S Blowing Time: within 10S, More Than 4S Required Response Time: Less Than 5S Lighting Type: Green, Yellow, Red Weight: Approx. 57g / 2.0oz Package List: 1 x Portable Alcohol Detector1 x USB Charging Cable 1 x User Manual