Features 1. High accuracy, specially designed for detecting alcohol content in human breath, very practical. 2. Equipped with advanced nano semiconductor alcohol sensor, offering good sensitivity, excellent repeatability, and reliable performance. 3. Backlit LCD screen with digital character display for clear and easy reading. 4. When the alcohol content in the breath exceeds the preset level, the device emits an alarm signal to alert the user for safety. 5. Compact and portable design, measuring approximately 15x5.5x2.5cm/5.9x2.2x1in, easy to use with no complicated operation. Specification Item Type: Breathalyzer Color: Black Material: ABS Size: Approx. 15x5.5x2.5cm/5.9x2.2x1in (Please allow 1-2mm difference due to manual measurement.) Sensor Type: Nano semiconductor alcohol sensor Working Power: DC4.5V (3pcs AAA batteries, not included) Use Environment: Temperature: -10-50C Relative Humidity: Less than 95%, no frost Alarm Mode: Blue backlit 3-digit LCD data display Exhaled Blood Alcohol Concentration (BAC): Driving: 20mg/100ml, 0.0909mg/L Drunk Driving: 80mg/100ml, 0.3636mg/L Package List 1 x Breathalyzer 10 x Mouthpieces 1 x Manual