Airmar R509 Low-Medium Chirp, 3kW, w/FB, No Connector, DTModel: R509C-LMDepth and fast-response water-temperature sensing2 to 3 kW of power for exceptional deep-water performanceLow frequency: 28 to 60 kHz, 23° to 9° port-starboard beamwidth, 11° to 5°...