SIR2.5 Sirius Satelite Marine Receiver Compact design JBL Sirius Receiver fits neatly out of the way Specifically engineered to only work with JBL Sirius-ready radios Two-wire hookup: antenna and 6&quot;&quot; data cable Size 5 1/8&quot;&quot;W x 11/8&quot;&quot;H x 33/16&quot;&quot;D