Feature:1. Drunk tester, supports mobile phone OTG plugin power supply, easy to use.2. It has a wide range of uses and is widely used in family, life, and medicine use.3. Simple operation, each test can obtain the most accurate and reliable BAC results.4. Portable design, small and lightweight, you can measure the ethanol concentration only by breathing.5. With prompt and red indicator light, it has high sensitivity, accuracy and reliability.Specification:Item Type: Driving Wine TesterMaterial: ABSColor: BlackBattery Type: Built-In BatteryBattery Capacity: 2000mAHConnector: Type COperation:1. This machine is a mobile phone OTG plug-in power supply alcohol tester.2. Pull out the side charging head and insert the mobile phone charging port to supply power.(Some brands of mobile phones do not automatically recognize OTG power supply and need to manually turn on the phone settings)3. Turn on: Press and hold the power button for 1 second, the device will turn on, the display will show in full, and a beep will prompt you to turn on.4. Warm-up: After turning on, the device enters the warm-up state, and the display shows "Warm up" and a 10-second countdown.5. Test: After the warm-up is over, the device enters the test state, with a "Di" prompt, it displays "Blow" and a 10-second countdown. At this time, you can align and blow test. When the device detects that alcohol-containing gas is blown in , The countdown jumps to 4 seconds to start the countdown.6. Result: The test result is based on %BAC as the concentration unit. When the test result is less than 0.02% BAC, the "Di" prompt will sound and the indicator light will not light up. When the test result is greater than or equal to 0.02% BAC and less than 0.08% BAC, a slow "Di Di" prompt will be displayed, and the indicator light will be red. When the test result is greater than or equal to 0.08% BAC, the prompt sound is quick "Di Di Di" prompt, the indicator light is red, and the display time is 12 seconds before the automatic shutdown.7. Shutdown: Press and hold the power button for 1 second, the device enters the shutdown state; after the test result display time is over, the device automatically enters the shutdown state, and the display shows "OFF" flashing twice and "Di" twice to prompt shutdown..Package List:1 x Driving Wine Tester