The RPS Studio Wireless TTL Remote Kit for Canon Cameras from Dot Line offers wireless E-TTL II control over speedlights and remote triggering of monolights. This system utilizes a frequency of 2.4 GHz over distances of up to 300' for excellent wireless coverage in an open area. There are also options for up to 3 groups and 2 channels for even more control over your lighting.
This kit has other control options, including multi-flash and manual for compatible flash units. Additionally, 1st and 2nd curtain sync is available as well as hi-speed sync is possible at shutter speeds of up to 1/8000 second. Each transmitter and receiver unit runs on 2 AA batteries and included in this kit are a PC cord, a single-pin cord, a 3-pin cord, a 3.5mm to 6.3mm adapter, lanyard, and flash stand.