From Manufacturer
The Cinetics Two Axis360 Pro Motorized Slider, Track, Pan, Tilt is a B&H Kit for users of most DSLR, mirrorless, and compact camcorders weighing 11 pounds or less who want two axes of motorized slide, pan, or tilt. The kit includes the Cinetics 360 Pro Motorized Slider, and an additional Cinetics Axis360 Motor and Controller that expands the motorized capabilities of the slider, which out of the box, only allows for one axis to be motorized.
The controllers can be operated individually, however daisy chaining the two controllers together, which requires an optional cable with a 3.5mm stereo mini jack, allows the controllers to synchronize and work together, allowing you to create complex, repeatable moves.