CAME-TV Power Dolly System with Remote, Motor & Dolly provides a motorized dolly to move your camera and tripod wirelessly with the included hand held remote. Create straight or curved camera motions on flat surfaces effortlessly. There are 10 levels of speed to choose from. A-B loop allows for setting start and end points and looping between them. Kits are available with straight and curved rails and for those that already have rails or want to save on shipping costs there is a kit available without rails.