Feature:1. BREATH ALCOHOL TESTER: The alcohol detector adopts non contact testing and can be shared with friends, safe and healthy. Automatically shuts down 10 seconds after the test results are displayed, saving power.2. SOUND LIGHT ALARM: The test result shows 0.02% to 0.05BAC (0.2 to 0.5g/l), the screen will display Caution. If the result is greater than or equal to 0.05% BAC (0.5g/l), the screen will display Danger and emit sound and light alarms.3. HIGH ACCURACY: This alcohol tester uses high precise semiconductor alcohol sensor, which can quickly respond and recover, providing you with reliable and stable results.4. WIDE TESTING RANGE: 0.0 to 1.9g/l, 0.00% to 0.19% BAC, accuracy 0.01% BAC, test results can be switched between g/l and mg/ml.5. EASY TO USE: Simple one key operation. Preheat for 10 seconds to obtain more accurate results. Blow for 3 to 5 seconds, and your BAC results will be displayed on a bright, easy to read LCD screen for 3 to 10 seconds.Specification:Item Type: Breath Alcohol TesterMaterial: ABSDisplay Method: 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: 3-10sPreheating Time: 10sBattery: 1 x 500mAh Lithium Battery (Built in), Including USB Charging CableService Life: 3-5 years, Use Times: 5000 Times.Package List:1 x Breath Alcohol Tester1 x USB Cable1 x User ManualNote:1. It takes about 20 minutes for alcohol to be absorbed from the digestive system and enter the bloodstream. It is recommended to measure after drinking for 20 minutes. If it is measured immediately after drinking, the measurement result is not blood alcohol content.2. To make the measurement more accurate, the time between two measurements must be greater than 3 minutes.