Rayamrine HV-300THP Hypervision Transducer Thru-Hull Plastic (Pair) - T70448The HyperVision 3D transducer provides a multitude of frequencies all within a single housing. Capable of simultaneously supplying RealVision 3D, DownVision, SideVision, and Conical High Frequency CHIRP, this is the only shallow to medium depth transducer you'll ever need. 1. 2MHz HyperVision DownVision and SideVision frequencies offer the utmost in clarity and lifelike sonar imaging.