The FC-WR Wireless Flash Commander works in concert with an unlimited number of FL-700WR flashes to create complex lighting setups while maintaining full TTL control of up to 3 separate groups. Radiowave communication enables control at up to 30m (100 ft), even with obstructions. A large, illuminated LCD panel provides information on radio settings, flash modes and lighting ratios and easy to access direct buttons mirror those found on Olympus flash units for intuitive operation, all while maintaining the same dustproof and splashproof construction of your weathersealed OM-D body and M.Zuiko Pro lenses.