Airmar B117 50/200kHz 600W Mix Match 0 Deadrise [B117-DT-MM]B117 50 200kHz 600W Mix & Match 0 Deadrise Airmars entry level B117 features a single, 50 200 kHz, dual frequency, ceramic element in a low profile bronze housing. The nearly flush design minimizes drag with only 5 mm (3 16") extending outside the hull. Features: Depth only or depth and fast response water temperature sensing 600 W of power Dual frequency element: 50 kHz with a wide 45 beamwidth for depth performance to 353 m (1200') 200 kHz with a 12