The black PocketWizard Plus III Transceiver is a highly versatile and robust radio trigger that is compatible with all prior FCC-version PocketWizards, as well as most flash and camera systems. Featuring 32 channels to choose from, this transceiver is simple to use in even the busiest of situations. Wireless remote control is possible through the use of Quad-Zone Triggering, which allows you to manage up to 4 zones of remote PocketWizard-enabled cameras or flashes from one position. Without having to leave camera position, you can activate and deactivate groups of flashes quickly and easily. This transceiver also employ's PocketWizard's Auto-Sensing technology, which instantly allows your device to fluctuate from transmitter to receiver. This technology works directly in line with the Auto-Relay function for a completely remote workflow.