Easy Measurement: Useful breathalyzer to accurately determine body alcohol content (BAC) by simply inflating on the instrument. Smart Alarm: When the alcohol content is higher than 0.05% BAC, it will beep continuously themselves and To remind drivers not to drive. Lightweight and Portable: Super compact design, breathalyzer fits in your pocket, easy to hold and carry no matter where you go. Ideal for drivers. Easy Operation: Just insert 3 AAA batteries, press the breathalyzer switch, wait 10 seconds to warm up, then you can start testing. The breathalyzer switches automatically off to save power when there is no operation. Small and portable: This breathalyzer breathalyzer is space-saving, lightweight, portable and easy to hold NOTE: The time interval is more than 3 minutes . Specifications: Material: ABS Color: Black LCD Size: 1.7" Measurement Range: 0.000-0.199% BAC Accuracy: 0.01% BAC BAC alarm: 0.050% BAC > Item Weight: 60g Package Size: 158*105*50mm/6.22*4.13*1.97in. Package Weight: 133g Package List: 1 * Breathalyzer 5 * Mouthpieces 1 * User Manual