Features: *1. Upgraded alcohol tester has additional memory function to store up to 50 groups of test results. *2. Non-contact breathalyzer needs no disposable mouthpiece. Designed with a purification room that purifies distractors leaving only alcohol, the sensor will show you the alcohol concentration in high precision. *3. Three color blocks and digit display show you the alcohol test result intuitively. *4. USB rechargeable, the high-capacity lithium battery lasts long on a full charge. *5. Portable and easy to store, the breathalyzer is great for home use, outdoor camping, carnival, and more occasions, place it in your car and test your breath when you need it. Attention: *1. It takes at least 20 minutes for alcohol to be absorbed from the digestive system into the blood system. So it is recommended to test 20 minutes after drinking. *2. Please do not directly wipe the product with chemicals or corrosive solvents to prevent liquid from flowing into the blowing hole. *3. If tested under low battery conditions, there will be a certain deviation between the test value and the actual value. Description: *1. Accuracy: 0.005% BAC *2. Reaction Time: