Cannon Link Downrigger Control Module CannonLink Fishing System Module from Humminbird allows you to network up to 6 Cannon downriggers to the fishfinder Use with Humminbird 700, 800, 900 and 1100 series fishfinders Compatible with Digi-Troll 5, 10, or Mag 20 series downriggers Operate each downrigger directly from your fishfinder 1-year warranty