2026 Duotone ePart eHarness Battery Box bfday4 Pitch stable across a broad

Pitch stable across a broad speed range

but it’s the one that gets you going with ease and helps you navigate tough spots when power or wind is lacking

With a radically lightweight and ultra-stiff Aluula airframe

Prone Foiling / Downwind / Wake Foil / Wing Foil

2026 Duotone ePart eHarness Battery Box bfday4 Pitch stable across a broadDuotone eHarness Battery Box is the waterproof housing that holds your Foil Assist batteries and the Bluetooth receiver that keeps your eRemote connected to the motor. Built from durable hard plastic, it's engineered to stay sealed under real riding conditions a sliding lock combined with a sealing ring keeps the box shut and watertight, while a Gore Tex valve on the back vents pressure without letting water in. The receiver lives right in the lid,