The EWAVE Jetboard from China is an electric surfboard similar to the Jetsurf models from Czech Republic.
Ewave tried to bring out a cheaper Jetboard with more functionality. For example one idea was to offer an electric hydrofoil kit. The plan was that the user can exchange the jet drive with an eFoil kit (mast plus propeller and wings).
So far only prototypes were shown and the eFoil kit seems still not available. More about Ewave in our blog article Ewave Jetboard from China.