LED display for easy reading of data. Indicators of red-orange-green 3 colors to show the alcohol concentration. Air intake can filter other impurities, accurate reading. Type-C Fast charging, it takes about 2.5 hours to fully charge, Can be used for 3 months. Mini size for easy portability. H2S with a hidden safety hammer, can be used for emergency situations. Type:Non- Alcohol Breathalyzer Product Name:Alcohol Tester Product Function:alcohol concentration test Charging Time:2.5 hours Battery Capacity:220mAh Charging :USB charging Instructions for use: 1. Press the power button and wait for 10 seconds to 2. Wait 1-10 seconds for the test result after blowing Note:In order to the test is more accurate, it is recommended to wait 20 minutes after drinking before testing. The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Type:B:With safety hammer Colour:Black Material:Plastic Package Contents: 1 * Car Air Purifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.