The Vinten FHR-155 Robotic Head with Integrated StarTracker System is a fully functional robotic head. Suitable for studio or remote work, the head is nearly silent and supports up to 155 pounds. It has a cradle to adjust the center of gravity and balance of your camera on the head for best results. It also features a built-in floor movement tracking system, the StarTracker system, which provides information on the head's position in relation to the floor.