Features:  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.  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.  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.  Useful Breathalyzer: it has compact design and portable size, the advanced sensor ensures the accuracy of the measurement, very convenient to use.  Power Saving Auto-off: after the detection result is displayed for 10 seconds, the tester will shut down automatically.  Low Power Consumption: built-in with 500mAh lithium battery, easy to be recharged via the USB cable.    Specifications:  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 Weight: 100g / 3.53oz  Package Size: 19 * 4.5 * 3cm / 7.48 * 1.77 * 1.18in    Packing List:  1 * Tester  1 * Charging Cable  1 * Manual (English+Japanese)