USB audio adapter

[rick3000]

If it cuts off the radio is likely just a universal adapter that is plugged in between the antenna and the HU. It would be easy to remove, and the USB is probably just there for power while using the 3.5mm audio jack (likely wired to the phone connector under the center console).

If you have a Becker HU, you may be able to install an AUX jack that does not interfere with the radio.

Brand is tough, this type of setup is a dime a dozen from China.