Product name: Push cover type alcohol tester Description: Use this small non-contact alcohol breath analyzer to quickly calculate your blood alcohol concentration. There is no need to worry about forgetting to install the mouthpiece or hygiene problems, and you can blow directly into the inhaler of the tester without a mouthpiece, which is more convenient and safer. Take it with you and test your BAC anytime, anywhere. Easy to use and light in weight. Low power consumption, automatic shutdown. Backlit LCD display, three-color indicator light test results are clear at a glance. Dust-proof design, sliding to close the air inlet, long-term use. Instructions: 1. Long press the power button for 1 second, the LCD Alcohol Tester turns on and emits a beeping sound. 2. The preheating mode counts down for 10 seconds. 3. After the warm-up mode, the test mode counts down from 10 to 00, and blow air during this period. 4. After deep inhalation, blow into the breathing inhaler with normal power for 3-5 seconds. 5. Read the test result from the LCD alcohol tester. 6. Test range: 0.00%-0.19% BAC and 0.0-1.9g/L. The product contains: 1pc alcohol tester