For limited time only, save 31.24% on the RadioPopper PX Transmitter Unit dropping from 189.00 to 129.95 and Shipping is free! . Bonus: No sales tax either, unless you live in New York or New Jersey.
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.