Using the PocketWizard PowerST4 Receiver for Elinchrom RX can give you near-total remote control over all your Elinchrom RX strobes--with either the MiniTT1 Transmitter or FlexTT5 Transceiver (both optional, use of one is required) on your camera and a PowerST4 plugged into your Elinchrom RX flash, you can now change flash power settings directly from your camera position. Use the PowerTracking function and when you change ISO or aperture, the lights automatically adjust their power setting.