Television production trucks were developed to take television studios on the road so video productions could be made at distant locations for a remote broadcast, outside broadcasting (OB), electronic field production (EFP) with multiple-camera setup and a support of a number of different technologies to bring everything together. Each production varies, some require a crew of about 12-16 to make sure the production goes smoothly. There are usually one or two other trucks following the main production truck with some of the equipment not able to fit in the main truck, as well as an uplink truck required to transmit the video back to the studio via a communications satellite. There are companies that contain both the functions of a satellite truck and production truck in a single truck body to save space, time and are considerably low cost.