The MIL-BTREC Bluetooth adapter from Milennia.
This compact accessory plugs into the rear RCA auxiliary inputs of any compatible radio and gives you the ability to enjoy Bluetooth® audio streaming. Supply power and ground to the MIL-BTREC, pair it up with your iPhone®, Android smartphone or other Bluetooth®-enabled music player, and get set to stream music. It's an instant upgrade, without the trouble and expense of buying a new receiver!
The MIL-BTREC Bluetooth adapter is a great solution for your boat, your "weekend" car or truck, or a variety of other 12-volt applications. With the right adapters, you can even connect it to a home stereo with an RCA or mini-jack AUX input. Warranty: 1 year.