DESC: GPSMAP 535s, comes with a powerful digital sounder (up to 1 kW) and dual beam transducer that clearly paints depth contours, fish targets and structure. It’s also CANet™ compatible, so you can share sounder data with another chartplotter on your boat. For continuously-updated weather information, you can add the optional GXM 31 antenna to receive XM satellite weather, including NEXRAD radar, and hundreds of XM radio stations right on your chartplotter.