Twin-wheel design with 136kg/ 300lbs weight capacity and much greater traction on grass and gravel. Easy attachment: attaches to any wheelchair, fully attendant control, making pushing any wheelchair simple and easy. With speeds up to 5.5 kph/ 3.4 mph and a range of up to 16km/ 10 miles, there is more than enough capacity for most days out. Convenient forward and reverse direction switch. Portable: lightweight for easy transport, packs neatly into a travel bag and enables the extra mobility anywhere.