Welcome to our shop We are pleased to introduce our Alcohol Tester with fast response and accurate results. This tester comes with a professional airway design and a high-precision semiconductor sensor, ensuring reliable and precise readings. With its one-button operation, this breathalyzer is easy to use. Simply press the switch and wait for 10 seconds to warm up. Then, blow into the tester using the provided mouthpiece for 3-10 seconds. The concentration result will be displayed digitally, allowing you to easily view the results. The quick response and accurate readings make this breathalyzer a convenient tool for testing alcohol concentration. The clear screen display of this professional breathalyzer offers three unit measurements to choose from: % BAC, BAC, and mg/l. The digital tester also features an alarm sound when the alcohol concentration exceeds the standard value. The high-definition color display makes it easy to view the measurement values. Additionally, the built-in 270mAh battery can be conveniently charged via USB. Designed to be compact and portable, this breathalyzer is perfect for carrying in a purse, pocket, or on a keychain. It is also suitable for use in cars. This makes it ideal for you and your family to ensure safe driving by providing professional accuracy in alcohol testing. We would like to remind you that this portable breath alcohol tester has a built-in purification box to filter impurities and accurately detect alcohol content. For best results, we recommend waiting 20 minutes after drinking before taking the test. Additionally, to ensure accurate readings, please wait three minutes between each test. Note: 1. Please allow small size error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. (Customer satisfaction is our top priority. If you find any product problems after receiving the goods, such as damage or incorrect quantity, please contact us immediately. We will try our best to provide you with satisfactory after sales service) Thank you for meeting me.I hope this helps you. Wish you a happy life. Thank you for choosing our Alcohol Tester