Features: Easy to use: The alcohols detector is equipped with a rechargeable 300mAh battery and USB charging function. After only 10 seconds of warming-up time, breathing into the device for 5 seconds is sufficient. The LCD display screen shows the result within 3 seconds Modern small size design: adopts non-contact technology. Weighing only 25 grams, it is perfect for carrying in a handbag or jacket pocket. After 10 seconds of inactivity, the device will automatically shut down, which is ideal choice for improving energy efficiency. Intelligent alarm: It will issue a voice warning to prevent drunkenness. The system supports regulatory compliance and prevents penalties/risks. Professional accuracy: Equipped with high-precisions semiconductor alcohols sensors and certified equipment to provide reliable measurement result. It is very suitable for home users to view friends/family in social situations. Widely applicable: not only suitable for authorities, but also ideal choice for private use, family celebrations, and event. Specifications: Material: ABS Yellow lights on: Drunk driving Green light on: Not exceeding the standard Red light on: Drunk driving Size:Approx.92mm/3.62''x26.3mm/1.03'' Charging:USB Package Includes: 1Piece Alcohols Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.