The TROLLMaster® Pro Digital Throttle Control lets you control your gas-powered trolling motor with more precision than you ever thought possible. You can adjust your boat to the exact speed you need to catch salmon, steelhead, trout, walleye and even tuna. It won't interfere with normal throttle operation, and saltwater-grade ruggedness means you can confidently use your TROLLMaster throttle controller in any marine conditions. The unique IDLE function with Speed Memory drops to idle to allow you to manage your catch, and once you're ready to begin trolling again, you can return to the precise speed you had set with Speed Memory. Requires mounting hardware kit (not included). Unprecedented throttle precision. Won't interfere with normal throttle operation. IDLE function with Speed Memory: drops to idle manage your catch, resumes same speed after the battle. View the TrollMaster Mounting Hardware Kit Size Guide ​​.