The XO BCC17 FM transmitter is a useful device for any driver who does not have a USB or AUX port in their vehicle. With a transmitter in the car, you do not have to worry about the battery of your mobile phone, tablet, or other portable devices. You can quickly and efficiently charge them through the USB ports. With this product, you can also play music from your mobile phone or even from a USB drive. Answer and reject calls, redial the last number, change the frequency, manage tracks, and adjust the volume - all with one transmitter.