The Raymarine SR6 combines a state-of-the-art Sirius weather and audio receiver with a 6-port network switch in one easy to install cost and space saving unit. By combining the two units into one, Raymarine has elimnated the need to purchase a separate network switch, thereby reducing the space required and decreasing the number of cables used. The SR6 delivers highly detailed, real-time forecast information including weather radar, storm tracks, sea surface temperature, wind, surface pressure, wave heights, lightning and much more. With the SR6 you can also enjoy over 128 channels of original satellite radio programming including commercial free music, sports, news, talk and more. Dimensions: 6.7"W x 7.7"H x 2.2"D; Wt: .66 lbs. NOTE: Antenna sold separately (Shakespeare SRA-40 or SRA-25). A monthly subscription to Sirius Marine Weather and/or Radio is required.