The Nikon WT-3A Wireless Transmitter puts the power of the camera controls in your hands. The WT-3A transmits images through wireless LAN (15 mbps transmission rate), Ethernet, or via USB for high speed transmission. The WT-3A also serves as an alternative to shutter release and AF start. It is compatible with Nikon D200 DSLR series. Includes Setup Utility software.