The autonomy of the product measuring 40-45 km could be attributed to the two batteries (each 65 amp/h) as well as the two powerful 300-Watt motors that are embedded into it. In order to aid outdoor travel, the diameter of the wheels of this product is larger, in comparison to other models. However, when travelling indoors, its decreased width facilitates easy movements through doorways. A standard feature of this product is an electrical leg rest which enhances comfort.