The PRO TrollMaster model gives users the ability to make quick and accurate speed adjustments. Ideal for fast flows and crowded salmon derbys where fast and precise speed adjustments are crucial. The full throttle range can be reached by turning the dial With the MAX THTL button, short-term speed spurts can quickly adjust your course or give your baits a life boost that evokes attacks from the following fish. The IDLE function is used when slowing down to reduce the speed. The preset trolling speed continues when the IDLE button is pressed a second time.