Feature:1. High Sensitivity: Alcohol detector is a high sensitivity alcohol measuring instrument with high accuracy.2. 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.3. Safe Hygienic: Accurate alcohol breathalyzer does not use traditional suction nozzles, it is 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.Specification:Item Type: Portable Alcohol DetectorProduct Material: ABSBattery Parameters: Lithium ion Battery (Included)Battery Capacity: 200mAhTest Range: 0.00 to 0.19%BAC(0 to 1.9g/l)Preheating Time: 10SBlowing Time: within 10S, More Than 4S RequiredResponse Time: Less Than 5SLighting Type: Green, Yellow, RedWeight: Approx. 57g / 2.0ozHow to Use:Press and hold the power button on the right to turn it on, and blow on the test port to detect the alcohol content.Package List:1 x Portable Alcohol Detector1 x USB Charging Cable1 x User ManualNote:Ships with built in battery.