4x4 fauteuil roulant

4wheel drive system , it's a crossover chair, it's all terrain chair.
it has very eco-friendly battery, silicone power battery, no pollution, no noise.
it can climb stair with max 25degree, and slope max 45degree, so it can span the curbs, stairs and wood roots .
it has synchro moving gradienter equipment, so the seat stays in the horizontal level all the time, it make you feeling very safe and comfortable,
360 degree revolving, no turning radius, small size, working in very narrow space.
ce, iso is ok.
it's patented, so no one can copy it.

So it would make people having independence and liking to get out for playing basketball, baking, fishing, playing snow and shopping, or enjoy on the seaside , so there would be no elders and handicapped people, only young and normal people.