The YN660 is built upon the previous YN560 IV, now providing 6 groups in the Radio Master mode, up from just 3 previously, as well as boosting power output to a Guide Number of 66 meters (ISO 100, 199mm), Other improvements include 24-199mm flash head zoom, lever locking foot, and updated buttons / main control dial.
It supports Yongnuo’s full 2.4GHz manual flash control system. YN660 can act as a wireless master flash for the previous-generation Yongnuo YN560 III and YN560 IV flashes, and as a slave (with remote adjustment) to the YN560-IV YN660 and Yongnuo YN560-TX RF-603 II RF-605 RF-602. Crucially, you are able to control up to six groups of flashes.
Suitable for:
Suit for All Standard Hot Shoe DSLR Camera, such as Canon, Nikon, Pentax, Olympus. .Except some Sony cameras (It needs hot shoe adapter to use the flash)
Compatible slave flash / receiver units include -YN560 IV, YN-560 III, and YN660 flashes. RF-605, RF-603 II.
Compatible transmitter / master flash units include -YN560 IV, and YN660 flashes. YN560-TX RF-605, RF-603 II. RF-602 With the YN560-TX tranmitter, and YN560 IV / YN660 flashes providing the most functionality, including Remote Manual Power and Flash Head Zoom Control.
Package included:
–1*YN-660Flash light;
–1* protecting bag;
–1* mini stand;
–1*manual book in Chinese and English;