The BPS4B Bluetooth® Amplifier allows your device to be played wirelessly without a head unit. Simply pair and wirelessly stream music directly to the amplifier or use the Aux-In for additional devices. The BPS4B’s compact size allows you to install the unit anywhere and in any application that has a 12 volt electrical system. The BPS4B Multi-function Control or “MFC” is a remote control for the amplifier and all sources (Bluetooth®, Aux-In). It functions as a source, volume, track, pairing and On/Off control. Also available as a kit with 2 pairs of 6.5” marine grade dual cone full range speakers.