Boss Audio MCKGB450W.6 Marine Audio Package w Speakers The Boss Audio MCKGB450W.6 Marine Audio Package is fully maranized for rough outdoor conditions. Offering multiple audio options through Aux input, Bluetooth, or USB inputs. Comes with a pair of 6.5 speakers. Features a 1A USB charging port. The Switchable tuner allows for tuning to stations in both USA and Europe. Features Bluetooth Audio Streaming Aux Inputs 180 Watts Max 90 per pair Compatible with Smartphones or MP3 players Weather Proof