The Vinten FH-155 Robotic/Manual Head with Integrated StarTracker System is a fully functional robotic head that can be easily switched between robotic and manual modes. Suitable for studio or remote work, the head is nearly silent in either robotic or manual mode and supports up to 155 pounds. It features a built-in floor movement tracking system, the StarTracker system, which provides information on the head's position in relation to the floor.