Nikon has always had a speedlight transmitter in the form of the SU-800. This commander does infrared transmission. But a new Chinese company is deciding to create the same product for cheaper and add in more features. The new Debao SU800 transmitter has more transmission power, and can control flashes away from a further distance (20m vs 35m), has a further AF assist range, and it supports continuous shooting. Of course, that distance still depends on various factors, such as the sun.
Tech Specs and a comparison are after the jump.