YN560 IV Wireless Flash Speedlite, Master + Slave Flash + Built-in Trigger System, for Canon Nikon Pentax Olympus Fujifilm Panasonic Digital Cameras

YN560 IV=YN560III+YN560-TX, Supports Wireless Master Function., YN-560 IV can be used as master unit, provides 3 independent groups with controlling abiligy, realizing remote control the flas mode, flash output, and focal length of YN-560 IV and YN-560 III, One YN-560 IV can receive the wireless signal from YN560 IV, YN560-TX, RF-603 II and RF-602, with optical 16 channels. When YN-560 IV and YN560-TX used as transmitter, it can realize remote control and parameter settings., It can be triggered through the flash mounted on the camera, 2.4G wirless triggering system, S1 and S2 pre flash cancel mode., Supports setting save automatically, custom settings ( fn ). GN58@ISO100, 105mm ( M / MUlti mode ). Supports ultra-fast charging recycle system, External power supply.