Specification:Item Type: BreathalyzerMaterial: ABSBattery: Lithium battery 3.7V 200mAhApplication: DetectionBasic Parameters: Detection Range: 0.000~0.19%BAC; 0~1.9g/LHow To Use The Tester: 1. Press the button for 1 second to turn on, the backlight and the display will light up at the same time, display all the content and a beep prompt to turn on.2. The display shows Warm up and a 10 second countdown. After the countdown is over, a beep will sound, indicating that will enter the stage at the same time.3. The display shows Blow and a 10 second countdown. Blow to the blowing place for 3‑5 seconds. After the countdown is over, a beep sound will prompt you to enter the result display. The test result is displayed in two units of %BAC and g/l.4. When the test result is less than 0.02% BAC, the green indicator light is always on.5. When the test result is greater than or equal to 0.02%ABC and less than 0.05%BAC, the yellow indicator light is always on, the Caution icon on the display screen is flashing, and there is a slow beep sound.6. When the test result is greater than or equal to 0.05% BAC, the red indicator light is always on, the Danger icon is flashing, and there is a rapid beep sound. The test results show a time of 10 seconds.Package List:1 x Instrument1 x USB Cable1 x User Manual