• Uses mechanical rather than electrical energy: in the boat the supply of solar panel energy is precious. We could not have all of these machines powered by on-board batteries. We can therefore be more autonomous without needing to increase our electric storage capacity. • Allows one to exercise in a useful and enjoyable way. • Easily repairable and upgradeable: the special feature of this crankset is that it is multifunctional; you can connect an infinite number of tools to it.
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