Bottom Line Fish Finders 

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Cannon Downriggers!

Uni Troll Get the biggest bang for your buck! You get a downrigger with a low-profile swivel base and telescopic boom to boot, all in one package.
The Cannon downrigger line of products is built tough, from the affordable Easy Troll 2 to the sophisticated Digi Troll IV.
Digi Troll IV Designed for serious sport fishermen who demand the ultimate in downrigger technology. Digi-Troll IV is equipped with Positive Ions which allows you to attract more fish by creating a field of positive ions around your boat.