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. Item Type: Breath Alcohol Tester 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: 3-10s Preheating Time: 10s Battery: 1 x 500mAh Lithium Battery (Built in), Including USB Charging Cable Service Life: 3-5 years, Use Times: 5000 Times 1 x Breath Alcohol Tester 1 x USB Cable 1 x User Manual