Yongnuo YN560-TX Wireless Flash Controller for YN-560III YN-560TX YN560TX Speedlite Nikon DSLR Cameras Compatible with YN-560 III, RF-602, RF-603, RF-603 II Zoom Head Control and Fast Setting Interface Large and clear screen, user friendly interface Adjust flash function though the controller directly.,Wireless triggering function. Transmission Range: 100 Meters.