AS GR50 GPS Sensor 50 ChannelThe Humminbird 50-Channel GPS/WAAS receiver gives you lightning fast position fixes accurate within 2.5 meters. This receiver can be used in lower signal areas (compared to a AS GR16) and still maintain a position fix. It also has a faster Time to First Fix (TTFF). Features:The receiver's dimensions are: 3.25 diameter 1.5 highComes with 20 feet of cable Has a 1-14 thread count stem mountable with optional antenna stem (antenna stem not included) 1 year warranty Product : HUMMINBIRD AS GR50 GPS SENSOR 50 CHANNEL Manufacturer : HUMMINBIRD PARTS Manufacturer Part No : 407480-1 UPC : 082324508165