The Optimum provides the intelligence needed to put the bait where the fish are. Precisely troll any lure while presenting depth and trolling data on a full-color 3.5" LCD display. Optimum wirelessly networks up to four downriggers which can be controlled simultaneously through the Cannon mobile app or a compatible Humminbird fish finder. Compatibility with Fish Hawk X4D Electronics allows you to monitor the depth, temperature and speed at your weight. Precision Controls - Stores up to 5 Preset Depths & remembers the depth of last catch. Cycle the weight up & down at preset intervals with Depth Cycle, or use Bottom Tracking to automatically keep your bait at preset distance from the bottom. One-Boat Network - Complete wireless Integration with select Humminbird fish finders for full control & critical trolling data. Waterline Zero - Protect your boat from swinging weights. Your downrigger will automatically keep your weight at a set distance below the waterline. | Minn Kota Cannon Optimum Electric Downrigger, 24"-53" Telescopic Boom