Transform your paddleboard or kayak into a motorized watercraft in minutes with the Bixpy US Fin Adapter, designed specifically for seamless integration with K-1 and J-2 motors. This ingenious plug-and-play adapter slides directly into your existing US Fin Box system, replacing your standard fin without tools or complicated setup. Built with waterproof, dirt-proof, and corrosion-resistant materials, this compact adapter thrives in both saltwater and freshwater environments, making it your reliable companion whether you're exploring coastal waters or inland lakes. At just 6.5" long with a sleek profile, it won't compromise your craft's performance when the motor isn't attached, yet provides the sturdy foundation needed to harness Bixpy's efficient propulsion when adventure calls.