Pro-Troll Fishing Products ProChip 4-Inch Flasher ProChip 4 Flasher with an EChip encourages Kokanee/Landlocked Salmon, Trout and Walleye to strike Patented agitator kicker fin in the tail for added lure action/flash and double ball bearing swivels Embedded EChip bait technology duplicates the electrical nerve discharge of live bait, which triggers strikes by nearby predators Trolled 10-20" ahead of a lure, the flashers are used in-line at slow speeds or dangling off of a ring at any speed