User's Manual

5.Factory Reset
6.USB Firmware Upgrade
Hold down the [MODE] and [AF/SS]
buttons at the same time until the
screen as shown, then loosen to
restore factory settings.
1).Visit YONGNUO official website:
http://www.hkyongnuo.com/e-detail.php?ID=339
to download the firmware upgrade software and the latest
firmware.
2).Turn off . Keep pressing [mode] button and turn on again. The
screen will show
3).Connect the controller to PC via USB-MINIB cable
.
4).Complete the firmware upgrade operation according to the
prompt of software.
firmware upgrade interface(
).
(not
include)
will display the
current version
Reference