Function: Alcohol concentration test.Battery: Polymer battery.Charging :USB_TYPE-C interface.Operation time :10 seconds.Heating time :10 seconds.Response time: less than 5 seconds.Alcohol concentration range :0.0g/L-1.9g/L(BAC 0.00%-0.19%).Product size: 76.6mm *42.6mm*18.0mm.Operating temperature :5-85.Battery capacity 270mah.Note:1. Please wait at least 20 minutes after drinking alcohol, because it takes about 20 minutes for alcohol to be absorbed into the blood from the digestive system. If you test immediately after drinking alcohol, the results can only reflect the alcohol concentration in the mouth at that time, not the alcohol concentration in the blood.2. For more accurate test results, please wait 20 minutes after drinking alcohol before taking the test. It is recommended that the interval between two tests be more than 3 minutes.3. Please do not wipe the product with chemicals or corrosive solution directly to avoid the liquid flowing into the blow hole and damaging the function of the product.4. If there is a high concentration of interference gas, the product will not work normally.5. If the test is carried out under low power, there will be a certain deviation between the test value and the real value.6. Do not blow saliva, residue or smoke into the blow hole of the product to avoid interfering with the test results and causing damage to the product.7. Do not store or expose the product in a high temperature place, which will cause damage to the sensor and thus affect the accuracy of detection.8. Avoid making the product fall from height or disassembling and repairing without authorization.