FCV628 5.7" Color Fishfinder with RezBoost The 5.7" FCV628 is a dual-frequency fish finder equipped with revolutionary new RezBoostT signal processing technology that increases resolution and improves target separation by up to 8x, utilizing a compact narrowband transducer. It offers improved clarity and resolution previously impossible with conventional narrowband transducers. A fast transmission rate of 3,000 PRR (Pulse Repetition Rate) per minute (at 5 m depth range), ensuring excellent target separation and clarity.The FCV628 includes a White Line feature to easily and accurately discriminate fish lying near the bottom. The top edge of the bottom echo is displayed in white to clearly show bottom structures. This feature helps to discriminate between weeds and bottom fish.The FCV628 also offers a number of unique features only found on Furuno Fish Finders. ACCU-FISH is a unique fish size analyzer based on the latest digital technology. Accu-Fish allows the FCV628 to display the actual fish size on individual fish echoes on-screen. When used concurrently with Fish Marks, Accu-Fish is a great help in identifying fish targets on the display. Alternatively, Accu-Fish can display the actual depth of the fish target instead of fish size.Bottom Discrimination provides an at-a-glance recognition of bottom composition with four types of graphical displays (Rocks/Sand/Gravel/Mud) when connected to a supported thru-hull or transom mount transducer.The FCV628 comes equipped with a number of configurable Alarm functions such as depth and fish echo alerts.Furuno's TLL (Target Lat/Lon) output allows you to share and display information on a chart plotter. Easily interface the FCV628 with your Furuno Chart Plotter so that you can mark fishing grounds with various information (L/L, Depth, Water Temp, Fish size and Bottom type).This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.