Feature: 1. Safe and Easy to Use: blow for 3~5 seconds near the detector blow port, then wait for a few seconds, the test result will display. No contacting detection is safer. 2. Testing Result Indication: if the result is 0.02%~0.05BAC(0.2~0.5g/l), it will display Caution on the screen, if the result is ≥0.05%BAC(0.5g/l), the screen will display Danger, and sound and light alarm. 3. Professional Alcohol Tester: 0.00%~0.19%BAC(0.0~1.9g/l) detecting range, 0.01%BAC accuracy, the test result also can be switched between g/l and mg/ml. 4. Useful Breathalyzer: it has compact design and portable size, the advanced sensor ensures the accuracy of the measurement, very convenient to use. 5. Power Saving Auto-off: after the detection result is displayed for 10 seconds, the tester will shut down automatically. 6. Low Power Consumption: built-in with 500mAh lithium battery, easy to be recharged via the USB cable. Specification: Material: ABS Display Method: LCD screen display Atmospheric Pressure: 86~106kPa Alcohol Sensor Type: Semiconductor sensor Detection Range: 0.0~1.9g/l & 0.00%~0.19%BAC Accuracy: 0.01%BAC Response Time: 3~10 seconds Warm-up Time: 10s Charging: 5V DC USB Battery: 500mAh lithium battery Item Size: 185 * 43 * 25mm / 7.28 * 1.69 * 0.98in Item Weight: 70g / 2.47oz . Package List: 1 * Tester 1 * Charging Cable 1 * Manual (English)