Airmar B45 Bronze Thru-Hull with Fairing Block - 50/200 kHz - 600W - 9-Pin Connector (xSonic) [B45-DT-9N]B45 Bronze Thru Hull with Fairing Block 50 200 kHz 600W 9 Pin Connector (xSonic) The B45 is Airmars smallest and most economical, dual frequency, bronze, stem transducer. It features a single, 50 200 kHz ceramic element. The included fairing streamlines the transducer and increases the performanceeven at higher speeds. Features The depth and fast response water temperature sensing 600 W of power Dual frequency element: 50 kHz with a wide 45 beamwidth