Boss Audio MCBK634B.6 Marine Stereo 6.5" Speaker Kit - Black [MCBK634B.6]MCBK634B. 6 Marine Stereo & 6. 5" Speaker Kit Black This stereo speaker combo package from Boss is a great way to upgrade the audio on your boat, RV or ATV without emptying your wallet. The all weather stereo features built in Bluetooth, so you can stream your favorite tunes without taking your phone out of your pocket. And your music will sound great on the 6 1 2" marine rated speakers. This package also includes a 41" dipole antenna, auxiliary cable