Yongnuo USA has announced Speedlite YN660 flash recently, use of flash during your photo shoot will no longer pose any problem when you have this extremely user-friendly component right at hand. The Yongnuo Speedlite YN660 comes with a rear LCD screen and a 2.4 GHz radio system. It can be used as a master trigger for YN660, YN560-IV, and YN560-III flashes …
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