Add the Raymarine DSM300 Digital Sounder Module to your E or C-Series display and experience state-of-the-art high definition fish imaging on your navigation center. The DSM300 is a digitally adaptive transmitter receiver with infinite receiver bandwidth settings and digital filter. This means the sounder will constantly adjust transmitter and receiver parameters to intelligently analyze fish, bottom echoes, and automatically produce a crystal clear picture that can't be matched by traditional analog transmitters. This 50/200kHz dual frequency sounder provides 1000 or 600 watt RMS output power depending upon your choice of transducers. Standard sounder functions on your display will include A-Scope real time display, auto or manual zoom display, bottom lock, full screen or split screen with other E or C-Series functions, white-line feature that distinguishes between fish and the bottom, and a depth temperature graph. 1'-2000' depth scale. Two-year warranty.