Yongnuo CA-63YN-560TXC YN560-TX Wireless Flash Controller and Commander for YN-560III YN-560TX YN560TX Speedlight for Canon DSLR Cameras Adjust flash function though the controller directly. Wireless triggering function. Set group, up to 6 groups. Set the flash output and flash mode. Modify multi flash frequency and count. Modify zoom for each group. Compatible with RF602 / RF603 / RF603 II. Transmission Range: 100 Meters. Support Wireless Shutter Receiver of RF603 / RF603 II. Large and clear screen, user friendly interface. Powered by two AA batteries. (not included) Suit for Canon DSLR camera.