High Accuracy Electrochemical Alcohol Tester Digital Breathalyzer Voice Detector. Hidden Mouthpieces. Three colors for results show. TFT Display Screen. Voice Prompt. Can test over-night BAC. AT-009 is a portable voice prompt alcohol content detector, the core components of the instrument is electrochemical sensor with high sensitivity, high stability and high accuracy. The instrument adopts LCD display. How to use alcohol detector. 1. Power on: long the power button for 1 second, the device power on, and the display "di" voice prompt to turn on. 2. : the device enters state after power on, the display screen displays "Wait "and 100 seconds countdown,at the same time, equipment is ready, please wait voice prompts. warm-up time is 10 seconds. Detect blowing: after , the instrument enters testing state, and voice prompts "Please close to the air inlet to blow", the display shows "display" and flashes"---"and then waiting for blowing, waiting for . 4. Analysis: after blowing, "di" prompts, the instucment enters the data analysis mode, display "Blow" and "--" smybol scrolling, analysis 4 seconds, then shows the test result. Tips:The internal sensor oxidize when the tester has not been used for a long time. Before you use the tester, in order to achieve more accurate test results. it is recommended that the user can the test 2 to 3 times. Test Results: 1. When the instument detect blow air, the device enters into test mode and the display screen displays"Testing" and "" scrolling. the test person needs to blow 4 seconds continuously, the device prompt blowing error and display screen shows "err" flashing twice and "didi" prompts, and then the device returns to the blowing detection interface and waits for blowing. 2. The test results mode is"mg / 100ml", which is displayed on the display screen,also with concentration value and test status are displayed for 12 seconds. 3. When the te result is 0 mg / 100 ml, it shows "no alcohol" on the screen, and also "not drinking" voice prompts, the backlight is green 4. When the test result is 0 and Less than 20 mg / 100 ml, the screen dis plays "Drinking", "drunk" voice prompts, and the backlight is green. 5. When the test result is equal 20 and Less than 80 mg / 100 ml, the screen displays "Drinking", "drunk" voice prompts, and the backlight is yellow. 6. When the test result is equal 80 mg / 100 ml, the screen displays "Drunk", "drunk" voice prompts, and the backlight is red. Precautions: 1. Test at least 20 minutes after drinking , as it takes about 20minute for alcohol to be absorbed into the blood stream from the digestive system Tested immedately after drinking the results only reflect the concentration of alcohol in the mouth at the time not the concentration of alcohol in the blood 2. In order to make the test results accurate , please wait for 20 minutes after drinking , the test time is the last test more than 3 minutes 3. Do not wipe the product directly with chemicals or solutions to prevent liquid from flowing into the blow pipe 4. If the product is in a high concentration atmosphere the product not work properly 5. If the residual gas in the machine is too strong the product not display the results in test please gently lick the product Color: As Shown Material: Metal Package Contents: 1 * Alcohol Tester 1 * charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.