Features: *1. Lightweight and compact for easy portability. *3. Equipped with smart chips and high-sensitivity sensors, the measurement is more accurate. *4. Accurate values, high-definition large-screen display show the alcohol concentration, and the Red indicator light goes on when the concentration exceed 20ml/100ml, and the buzzer will automatically alarm. *5. USB rechargeable lithium battery avoids frequent battery replacement. *2. Test Range: 0.00-200mg/100ml *3. Test Accuracy: 10% (mg/100ml) *4. Warm-up Time: 10 seconds *5. Response Time: 5 seconds *6. Power Battery: 3.7V/200mAh rechargeable lithium battery *7. Interface: Micro-USB (5V/1A) *8. Material: ABS *9. Size: about 3.5x13.5x4.1cm Package Includes: 1 x Breathalyzer 5 x Mouthpiece 1 x Instruction 1 x Charging Cable Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement.