1.YN560-TX, Manual Flash Controller, made specially for Yongnuo YN-560 III.
2.If you want to use it with our other Yongnuo flash speedlite, you just need the transceiver of Yongnuo RF-602, RF-603, RF-603 II, because YN560-TX has built-in wireless trigger system.
3.You can use it not only as flash controller function, but aslo use it as remote control function.