This Belkin 1-port USB-A TuneCast is the perfect solution for in-car audio transmission needs. With its 3.5mm AUX and FM transmitter, you can enjoy your favorite tunes from your phone or other audio devices. It has a sleek black color and a compact design that makes it easy to carry and use while on the go. The device has one input and one output, and it's perfect for all your audio transmission needs. The device is great for anyone who wants an easy and convenient way to stream music while driving.