Features: Safe and Easy to Use: blow for 3~5 seconds near the detector blow port, then wait for a few seconds, the test will display. No contacting detection is .Testing Indication: if the is 0.02%~0.05BAC(0.2~0.5g/l), it will display Caution on the screen, if the 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 also can be switched between g/l and mg/ml.Useful Breathalyzer: it has design and portable size, the advanced sensor ensures the accuracy of the measurement, convenient to use.Power Saving Auto-off: after the detection 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:Color: blueMaterial: ABSDisplay : LCD screen displayAtmospheric Pressure: 86~106kPaAlcohol Sensor Type: Semiconductor sensorDetection Range: 0.0~1.9g/l & 0.00%~0.19%BACAccuracy: 0.01%BACResponse Time: 3~10 secondsWarm-up Time: 10sCharging: 5V DC USBBattery: 500mAh lithium batteryItem Size: 185 x 43 x 25mm / 7.28 x 1.69 x 0.98inItem Weight: 70g / 2.47ozPackage Contents:1 x TesterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.