Radio Frequency Channels: Three radio frequency channels are available for use (5, 10, and 15) to prevent interference when multiple pairings or photographers are shooting in one location How it Works: Photographers can use the WR-T10 or WR-1 to simultaneously release the shutter on multiple cameras that have a WR-R11b unit attached and have been paired with the WR-T10/WR-1 Wirelessly Controls: Uses radio frequencies to wirelessly control the shutter release on Nikon cameras or radio-controlled flash units such as the SB-5000 Speedlight. It fits cameras with a 10-pin connector