ZN-AT68 Blow Alcohol Detection Device Breath Tester Breathalyzer High-precision Handheld Portable Body Alcoholicity Analyzer Detector for Drivers Feature: This product is a portable alcohol tester. Using semiconductor type sensor, it has high flexibility and accuracy. Specification: Power supply: 3.7V lithium battery Current 180mA Battery capacity: 150mAh Storage function: 50 pieces of data can be stored Shell material: ABS Size: 100x26x18mm/3.94x1.02x0.71in Guideline: BAC: Blood Alcohol Concentration BrAC: Breath Alcohol Concentration Drinking and driving: the blood alcohol content in the human body is greater than or equal to 0.15mg/l and le than 0.25mg/l. Drunk driving: The blood alcohol content in the human body is greater than or equal to 0.25mg/l. Instructions for use: 1. Power on: Pre and hold the power button for 1 second, after a beep sound, the LCD screen of the tester starts. 2. Preheating: The characters "preheating" appear on the display, and the numbers in the upper left corner start to count down from 10 to 00. 3. Air blowing detection: After the "preheating" is completed, it enters the "air blowing" state, the display shows blowing characters, and the numbers start to count down from 10 to 00. Blow at any time during the countdown, after the machine senses the gas, the buzzer will make a beep to stop blowing. 4. Display results: The test results are read on the display. Pre and hold the power button for 1s to switch the unit, that is, the unit flashes after the value, and pre and hold again for 1s to exit. 5. The test result shows that the device will automatically shut down after 10s. Power on again for the next test. Description of test results: 1. If the alcohol concentration result is 0mg/L, the warning light does not respond. 2. If the alcohol concentration is >0mg/L and