With the SonicHub from Lowrance, you can rock out on the water without putting your electronics in harm's way. The SonicHub allows you to choose songs, control volume, and more through your existing Lowrance HDS displays, while your iPod or MP3 player is safely stowed in the fully waterproof dock compartment. Works through NMEA 2000 network. The SonicHub also allows you to operate an AM/FM tuner, Lowrance LWX-1 Sirius radio, and a USB stick with MP3s on it. Line-out for subwoofer. Stereo and mono line inputs. Includes a 4 channel x 50-watt speaker amplifier, 2 marine-grade 6.5" 200-watt speakers, and NMEA 2000 network T-connector plus 6' cable. AM/FM antenna not included.