Specification :

The FCV620 is a dual frequency (50 kHz and 200 kHz) Color LCD Sounder featuring Furuno's DSP technology that displays underwater conditions in 8, 16 or 64 colors on a super-bright 5.6" LCD screen.
Youve probably heard about digital fish finders, but arent quite sure what the difference is. The main difference is the filtering capabilities and auto adjustments. Our new DSP (Digital Signal Processing) technology helps adjust gain, STC Clutter and output power, as well as suppress main bang (the echoes just below the transducer.) It also makes the picture clearer and easier to decipher. But even the best digital filter wont help unless you start with a solid basis, such as Furunos renowned fish finder technology.