Garmin FishFinder 320c Color Display (No Transducer) manual Quick reference guide software. Garmin Fishfinder 320C is the first Garmin stand-alone color fish finder for both freshwater and saltwater. The 320c extends the Garmin line of dedicated sonar products and incorporates several software enhancements. Plus, 320c allows remote waypoint marking, which means you can send a specific location from your Fishfinder 320C to a Garmin® GPS. Now that's communication. Fish Finder 320C, with a sunlight-readable color display, intuitive software, and an affordable price, leaves extreme anglers no excuse not to go out and buy. Fish Finder 320c Features include: Five-inch (diagonal), 16-color TFT display that’s viewable in direct sunlight. User-selectable settings for overcast, sunny, and nighttime viewing. Simple sonar interface, with vital information on depth, zoom, range, frequency, and gain one touch away. Depth Control Gain (DCG®) automatically adjusts sonar sensitivity by depth and delivers a highly detailed image of bottom structure. See-Thru® technology separates fish returns from thermoclines and underwater structure to remove the guesswork in interpreting fish arches. Bottom lock gives anglers a constant view of the bottom within a user-configured depth parameter (e.g., viewing all activity from 40 feet down to the bottom). Temperature log graphically records temperature data. GPS repeater allows communication with a Garmin GPS, so anglers can use the remote waypoint-marking feature to send a specific location Please note that this package does NOT include the transducer!