Fovitec StudioPRO Wireless remote control trigger for SDX-200, SDX-400, SDX-600 Monolights The Wireless Remote Control for SDX Monolights is a radio remote trigger that is used with StudioPRO SDX-200, SDX-400, or SDX-600 monolight heads. This wireless trigger allows you to have full control of the monolight power from a distance. Compatible with: SP20-006-200, SP20-06-400, or SP20-006-600 Monolights only Compatible with Canon & Nikon Cameras This trigger gives you the ability to control all lights or you can set up to 7 channels independently.