RadioPopper PX Receiver with Antenna and Nikon Bracket

The RadioPopper PX Receiver to take advantage of eTTL/iTTL, manual and High Speed Sync, all while avoiding the drawbacks of line of sight, short range and sunlight interference, you'll need a PX Receiver. For every off-camera flash you'll use, you will need a PX Receiver. Although the PX receivers and transmitters are compatible with Nikon, each receiver comes with a mounting bracket that is specific to either Nikon flashes.