Reliable & Accuracy The alcohol breathalyzer uses a high-precision semiconductor alcohol sensor to provide you with a fast and accurate test result, no longer have to worry about whether can drive normally. Our professional alcohol tester can give you accurate answers. Easy to Use Warm up for countdown 100 (20 seconds) and blow into the breath inhaler for 5 seconds, then read the text result from the LCD screen. Press the button to switch 4 kinds of units (%BAC, BAC, mg/L, mg/100mL ). And comes with 20 replaceable mouthpieces for health and hygiene alcohol tests. LCD Display & Alarm Equipped with a large display screen, it is convenient for you to read information such as test results and battery level. When the result exceeds certain values alerts are given to tell you if it's safe to drive. To save electricity, there is an automatic shutdown function, if the 20s does not operate will automatically shut down.

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