The WT-3 is a high performance Wireless Transmitter specifically designed to increase the versatility of the Nikon D200. Whether you are on location or in the studio, it enables the transfer of images directly from the D200 to a computer or compatible printer via both Wireless LAN and Ethernet LAN, and both FTP and PTP/IP protocols are supported. The WT-3 also enables the remote control of the camera from a computer that has Nikon Camera Control Pro software installed. High-security options protect your images while they are being transferred, and the included Setup Utility makes it simple to connect to a variety of devices (such as computers, FTP servers and printers). To facilitate more comfortable vertical format shooting, there are separate buttons for shutter release and AF start, as well as a main and sub-command dial. The WT-3 is powered by the same rechargeable Li-on EN-EL3e Battery as the D200.