This plastic thru-hull mount transducer uses the low frequencies for deep water performance and high wide frequencies for shallow water performance.
 
 
A 2 kW in a slightly smaller package, this bare wire transducer has a depth of 6,000 feet; an operating frequency of 38 to 75 kHz and 150 to 250 kHz; a beamwidth of 9x23 degrees or a constant 25 degrees; and a 0 to 25 degree deadrise.
 
 
Transducer kit comes with installation instructions. Follow the instructions carefully to avoid damaging your boat.