Amazon.com : YONGNUO Upgraded YN560-TX II LCD Flash Trigger Remote Controller, for Canon and YN560IV/III YN660 with Wake-up Function for Canon Cameras : Electronics
Yongnuo YN660 - Flash speedlite for Canon and Nikon - Camera Gear
Yongnuo YN-660 Flash Review-The Most Powerful Flash Under $100 - YouTube
YONGNUO YN560-TX II Manual Flash Trigger Remote Controller LCD for Nikon DSLR Camera to YN560III/YN560IV/YN660/YN968N/YN860Li Speedlite RF-602/RF603/RF603 II/RF605 Receiver - Walmart.com