The D-Lite 200W/s RX 2 offers professional and convenience features usually found in flash heads twice its price. Forget about tripping over PC cords. Although this head accepts one, it also has a built-in EL-Skyport Receiver with eight frequency channels that can handle four distinct groups of flashes. The included transmitter not only allows you to trigger your flash at distances up to 393′ but gives you control of power, on/off, modeling light functions and Speed Sync activation. Free software for Mac and PC computers is available, providing additional features such as Flash-Delay for strobing effects. Add an optional Wi-Fi module to the transmitter and you can use specially designed apps that allow full remote control via your iPhone, iPad or iPod Touch. The auto-sensing, multi-voltage D-Lite RX 2 recognizes any AC power source from 90-260VAC, allowing you to use the kit anywhere in the world.