The project is a modular system. The base consists of a central body containing accumulators, electronics, sensors, equipped with four motorized legs, each one has three segments. The base when closed for transportation takes up little space. On the base is mounted the seating system, which can tilt respect to the base when ascending / descending slopes. Each leg ends in a sphere made of rubbery material that can be blocked, in the case of locomotion by walking, or rotated by its motor, blocking the legs, in case of flat terrain, to increase the autonomy. The project solves the following problems of current systems: locomotion on rough terrains, steps, steps and edges, stairs. Rotate on yourself in-place. Being able to be seated at different heights depending on the need. Having a modular electric charging system and practical to use. Maximize the autonomy of the road travelled with single charge.