Function: 1. This tester uses a high-accuracy semiconductor sensor that only takes 5 seconds to get the result to assess whether you can drive with high accuracy 2. When the concentration of respiratory factor to be measured exceeds 0,5%, the tester will emit alarm. There are 3 tips: safety, warning and danger. This tester has the advantages of automatic shutdown and sound alarm 3. The tester is very convenient to use. Simply insert the two included AA batteries, turn on the tester, and start the test. Suitable for weddings, parties, banquets or other social events to ensure safe driving after drinking alcohol 4. Your results will be displayed on a bright LED screen after 10 seconds. This small and lightweight, portable tester is great for tucking away in your back pocket. No matter where you are, you can take it with you. 5. The tester will turn off automatically 5 seconds after the test is completed, saving energy and protecting the environment. This portable tester is the first choice for all customers who care about safety Specifications: Item type: Drunk driving tester Size: approx. Very practical and easy to use. User Manual: Step 1. Fully charge the tester and turn it on by pressing the button. Step 2. Wait 15 seconds while flashing. Step 3. “Blow” with the “bip” sound, then start blowing. Step 4. Review the results. Product Description: This portable tester is easy to use. Simply press the button and blow into the folding mouthpiece to accurately read the concentration in your blood in seconds. It comes with 6 mouthpieces and 1 canvas bag that can carry out hygiene tests on multiple people and carry it with you. Suitable for weddings, parties, banquets or other social events. High accuracy and easy to read Sensitive solid-state sensor accurately displays content in seconds. Thanks to the wide backlit LCD display, the results are easy to read. Package List: 1 x Drunk Driving Tester6 x Mouthpiece1 x Material Bag1 x User Manual Note: [Reminder] To ensure the accuracy of the test results, check the breath meter 20 minutes after drinking, blow gently and evenly 3 times after heating for 15 seconds and take the average value to check the concentration. Because it takes 20 minutes to absorb from the digestive tract into the blood. If you are examined immediately after drinking, the result will only show the concentration in the mouth, not the concentration in the blood.