The Network Sounder sensor plugs into any NAVnet Display or into a Hub for multi-display installations. Turns any NAVnet Display into a dual-frequency 50/200 khz, 600 W Sounder. Incorporates all of the award winning Furuno Sounder features you've grown to depend on, including: Variety of presentation modes, including: marker zoom, bottom discrimination, bottom lock expansion and A-Scope, Audible and adjustable depth and fish alarms, eight range scales to 4,000', choice of fathoms, feet or meters, selectable screen background colors, including white (Color LCD units only) and automatic cruising and fishing modes to meet your style of boating. The only other item you will need to complete your NAVnet Network Sounder is a transducer.