A:Answer This unit is primarily meant to operate as a stand alone (hence the various inputs) although you can link it with other LG units. This has bluetooth, rca in, usb, fm radio, and cd player. It also can utilize the LG app on your smartphone to stream via wifi to the unit directly via the app. There is no 3.5 aux in, but you can get a 3.5 to rca converter cable to address that.