B00PH0XPG4 Yongnuo YN-560IV(560III upgrade version,a Combination of YN-560 III and YN560-TX all functions) 2.4G Wireless Flash Speedlite Trigger Controller for Canon Nikon Olympus Pentax

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Supports Wireless Slave Function, fully supports YN560-TX, RF-603 II RF-602 Wireless Transmitter
YN560 IV=YN560III+YN560-TX, Supports Wireless Master Function, Supports Multiple Trigger Synchronous Mode
Supports setting save automatically, custom settings ( fn )
GN58@ISO100, 105mm ( M / MUlti mode )
Supports ultra-fast charging recycle system, External power supply