Dumb and great working robo. Mechanically propelled. It turns its  wheels through a clockwork mechanism and runs down the program. So when its stuck it might stay and turn its wheels until the program changes direction and then it gets traction and moves on. So if you have patience and let it do its thing it works great. Best investment for the kit. Hose and adapters are included, those alone cost half the price when you buy them separately.