External 9 port dimmer that mounts directly on the side of the MGS100 LED light. This allows dimming from 1% to 100% output per board with simple plug-in connectors. Each dimmer can control up to 9 MGS100 lights at the same time, this allows for easy adjustment to your light levels. Includes dimmer and all the mounting hardware as well as cables. Measurements are very compact at 2″ x 2″.