Each Harken Electric requires one control box, one circuit breaker, and two analog switches or one Digital System Switch. All new electric Radial and Performa electric winches are supplied with the appropriate dual-function control box.Harken Performa Winches combine the high-efficiency of the Radial line with the sandblasted grip of Harken carbon-fiber racing winches for powerful hybrids. Performa winches are a great solution for crew who don't wish to invest in carbon winches or who need racing winches in smaller sizes.The Harken Electric Winches Rewind is the latest easy sailing solutions for cruisers, and the first winch of its kind in the marine market. Activated remotely by twin in/out buttons, the Rewind safely eases and trims highly-loaded sails in both directions without ever taking the line out of the self-tailer.Battery voltage and winch size determine which Harken Components you should use. For winches size B98 and above, contact Harken for appropriate components. All components sold separately.