The Iso-Max Satellite controller utilises the 13 function Can-Fan LCD EC Fan controller to drive its 2 output, 6 step transformer. Each slave unit is rated at 4 Amps. But able to power 2 high power 315mm Iso-Max fans with no humming or vibration. Up to 4 slave units can be chained from 1 LCD controller. When used on its own, it will act as a noiseless 6 step fan speed controller.