ITEM NAME:High-Precision Hand-Held Air-Blown Alcohol Tester Portable Drunk Driving Te E6G3 High-Precision Hand-Held Air-Blown Alcohol Tester Portable Drunk Driving Te E6G3 professional airway design, advanced nano-semiconductor alcohol sensor ,accurate measurement results, three alcohol measurement unit conversion rate (% / a few / mg / liter) blue backlit LCD digital display results ,rapid response and recovery,automatic shutdown,alcohol, automatic sound alarm overrun,sensor failure self-test, replaceable mouthpiece, distribution, 5 Product use:1 ,Open the battery cover of the rear case of the unit, load the three AAA and 1.5V batteries into the unit according to the polarity, and then install the battery cover to put it into operation. 2 ,Press the "Power On" button, with a short beep, the backlight will light up, and the screen will display a countdown from 100 to 000. The word "WAIT" will appear on the bottom of the screen, prompting the machine to run the warm-up program. Please do not blow at this time. Otherwise it will affect the test accuracy. After the warm-up is completed, the "WAIT" display disappears, the detector emits a beep, and the word "BLOW" is displayed, and the "C" letter is displayed. At this point, the next breathable alcohol content test can be started. Note: During the preheating process, the countdown speed is related to the last test concentration. The lower the concentration, the faster the countdown, otherwise the slower. 3 ,The test subject is deeply inhaled. When the "C" letter on the screen is displayed, the nozzle is continuously blown evenly until the unit makes a beep and stops blowing. 4 ,When the blowing is over, the screen will display the "" symbol and the word "TEST" will be displayed, indicating that the test result is being analyzed. Do not blow at this time, otherwise the test result will be affected. The concentration value displayed on the screen after the analysis is the alcohol content in the gas exhaled by the tester.