Fits metal, wood and fiberglass hulls. Dual frequencies at 200/50kHz with 600-watt maximum power. Compatible with Raymarine DSM30 and DSM300 sounder modules. Depth, speed and temperature sensors. Includes a 30-ft. cable and replaceable paddle-wheel assembly. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Big Boat Electronics.