How about the HydroWave unit which incorporates the latest in patented sound-emitting technology that effectively imitates the audible underwater sounds of baitfish and fish-feeding activities, of which research has proven to stimulate feeding impulses in game fish. The unit emits sound waves that predatory fish feel, hear and sense as natural baitfish activities, to “ignite a feeding frenzy.”? Kevin VanDam used it during the Bass Master Classic.