P66 50/200kHz, 600W, Navico 9-Pin, DT600 W The P66 Multisensor combines depth, and temperature functions in one housing. And it features our 50 200 kHz, dual frequency, ceramic element. This hydrodynamic housing with its rounded nose reduces the turbulence under the transducers acoustic face for clear display images. It is Airmars best transom mount for boats up to 8 m (25') long.