Manufacturer product-page feature description: rider can alternate between single (rear) drive for energy saving and dual (front+rear) drive for full power/traction, via the app or onboard controls; no detailed procedural steps were found in the extracted manual text beyond the general Speed Mode/System Settings menu description.
Fuente oficial: https://hikerboyscooter.com/products/curtis-dual (tier A). Traducción/paráfrasis fiel del manual oficial; no se ha añadido ningún procedimiento no documentado.