Usb function up to 32gb to play music from pendrives.
FM function: to pair with the radio station of the car. Frequency range: Mhz
Charging function: with 1 usb-C port and 2 usb-A 5V 3.1A/5V 1A ports to load devices.
Rgb LED Lighting: 7-color game, you can mix or choose a single color. The lights can also be turned off.
Memory: the device saves the latest radio station configured.
It also takes up the latest music played by usb.
Buttons: volume control, previous/follow/Light mode.