Rhino Arc II is a compact 4-axis motorized pan/tilt/focus head that enables you to capture unreal video and time-lapse shots. It can hold up to 15lbs of equipment (camera + lens + monitor, etc) and can mount to a tripod or to your Rhino Slider.
Interchangeable rails are the heart of the Rhino System. They allow you to completely change the weight, length, and load capacity of your slider setup without having to buy a completely new setup.