3. Equipped with smart chips and high-sensitivity sensors, the measurement is more accurate. 2. Two detection modes can meet the needs: the Precise mode requires the installation of a mouthpiece, and the detection is more accurate; the Quick check does not require a mouthpiece, which is suitable for multiple people to quickly check whether there is alcohol. 4. USB rechargeable lithium battery,800mAh the high-capacity lithium battery lasts long on a full charge. 1. Portable Design with High Accuracy: Featuring a portable design and utilizing high- semiconductor technology, the alcohol breathalyzer offers the most accurate readings and alerts users when excessive alcohol levels are detected, making it ideal for on-the-go testing. 5. Upgraded alcohol tester has additional memory function to store up to 50 groups of test results., Manufacturer: Akfldms