Feature:1. Accurate Detection: The core components of the instrument are semiconductor sensors, which have the advantages of high sensitivity, high stability and high accuracy.2. Portable: This alcohol tester is only half the size of the palm, easy to carry, small and exquisite, can be put into your pocket anytime, anywhere, ready to test.3. No Contact Test: Compared with the traditional alcohol tester, this alcohol tester is no need mouthpiece to test, which is healthier and safer.4. Wide Application: This alcohol tester is widely used in testing drunk driving, alcohol production, inspection, fire , express delivery, coal mine, enterprise, construction site, performance.5. ABS Material: Using excellent ABS material, this alcohol tester possesses impact resistance, scratch resistance, and comes with a long life span.How to Use:How to use the alcohol tester:1. Press the button for 1 second to turn it 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 it will enter the next stage at the same time.3. The display shows "Blow" and a 10 second countdown. Blow into the blowing place for 3 to 5 seconds. After the countdown is over, a "beep