Yes. Amazon has a number of Bluetooth receivers. I purchased one and wired it to the amp with a 1/8" mini headphone jack to L-R RCA plug adapter. It works great. I have a separate toggle under the dash to turn the amp on. Bluetooth receiver plugs into a USB port under the dash.
I made this panel from .030" alu sheet. Heater control, phone chargers for me and the wife, and red button for garage door. Spare USB for standalone GPS.
You can't see any of this sitting in the seat.