Guide number 58, E-TTL, i-TTL, Manual, Multi, HSS, Slave. Optical communication.
Guide number 60, E-TTL, Manual, Multi, HSS, Slave. Optical and radio communication.
Wireless trigger 2.4 Ghz. Can control YN-622, RF-602/603 receiver. M/Multi/TTL modes. HSS mode
Guide Number: 60. Modes: ETTL/Manual/Multi. HSS Synchro. YN622 and YN603II compatibility