RadioPopper PX Transmitter Unit

The PX Transmitter is the core of the best wireless flash system in the world, the PX System. To take advantage of the eTTL/iTTL and High Speed Synce, all while avoiding the drawbacks of the line of sight, short range and sunlight interference, you will need a PX Transmitter to control your remote flashes that have a PX Receiver attached. One transmitter will allow you to control as many flashes as you want.