Pro-Troll EChip SpinRay Flashers offer a revolutionary spin and kick design combined with Pro-Troll's EChip technology. The EChip consists of a small stainless steel tube with a stainless ball inside. At one end of the tube there is a special ceramic crystal. As the ball strikes each end, the crystal produces a tiny electric impulse which duplicates the nerve discharge of a baitfish. Coupled with the smooth spin of the SpinRay this flasher attracts more fish to your flies and lures. The SpinRay includes ball bearings with welded rings on both ends to reduce line twist.