Large color display and ventilation clip: KM28 Vehicle Bluetooth adapter uses a large color display that provides more information, such as telephone numbers, vehicle battery voltage, FM frequency and parts names. In addition, ventilation installation a better viewing angle for your . Dual USB Port and 4 Reading Mode: QC3.0 charge allows you to charge 80 %of your device's battery within 35 minutes. This radio adapter supports Bluetooth, USB drive, TF card slot (up to 64 GB) and 3.5 mm AUX output that meets your various needs. Hands search: Wirelessly transfer all your phone calls and sound flow through the Bluetooth transmitter. You can easily answer, close or reject a phone call with a rotating button. Enjoy smart sound control from the phone assistant. Try to say, 'Call my mother', 'Get directions to go home', take care of your work more easily and enjoy driving. . Considated audio performance: The large microphone can effectively collect the sound and prevent traffic background noise for CVC and DSP noise blocking more clearly. Also, it provides Bass and Tre strengthening modes for your adjustment, just dive into your personalized music style. .8 Color LED Back Imprint Mode: Press the light button to enter the light change mode long and choose from 7 mono color mode or dynamic color change mode to create a vibrant ambience, color your car!