The Raymarine B117600w Bronze Low Profile ThruHull Transducer has quickly become the transducer of choice for boats with up to 7 degrees of deadrise. It has the same performance as the B60 style thru-hull but the element is not tilted. The low profile design does not cause interference with water flow or create trailering issues. Operating Frequency: 50/200 khz. Compatible with Raymarine DSM30/DSM300/CP300/CP370.