YONGNUO Flash Speedlite YN600EX-RT for Canon AS Canon 600EX-RT ...YONGNUO YN-E3-RT,Canon’s 600EX-RT/ST-E3-RT Wireless Signal
One YN600EX-RT can be used as master unit to trigger YONGNUO YN600EX-RT,Canon’s 600EX-RT,and live display the flash group...