Bluetooth FM transmitter. It supports 3.6 Amp charging on one USB and 1 Amp on the other. In addition, the second USB has the ability to connect various flash drives, and use it through this transmitter as a flash drive. On top is an LED screen, with a couple of control buttons. This device also supports hands-free. You connect your smartphone via Bluetooth, and set the desired frequency on the stereo, and enjoy.