RaymarineRealVision 3D Transducer Extension Cable - 3M (10') [A80475]RealVision 3D Transducer Extension Cable 3M (10') RealVision 3D Transducer Extension Cables work with both the transom mounted RV 100, as well as through hull RV 200 and RV 300 series transducers. Each extension cable features a waterproof, twist lock connector at the MFD end and a compatible socket at the transducer end. For best performance, Raymarine recommends using no more than two (2) extension cables in any given cable run. Specifications: