Fantastic clarity and target separation with RezBoostTM technology! FCV-588 uses revolutionary new RezBoostTM technology that increases resolution and improves target separation, utilizing a compact narrowband transducer. RezBoostTM is a revolutionary new signal processing technology developed by FURUNO that improves resolution and target separation when using conventional narrowband transducers. Spot individual game fish surrounding bait balls, as well as fish close to the seabed. With RezBoostTM, not only can you expect higher resolution and crisper visuals, but also improvements in the ACCU-FISHTM function.