SHENZHEN YONGNUO PHOTOGRAPHIC EQUIPMENT CO. LTD YN686EX-RT 用户手册

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advise you to read this section.
1.Please avoid the excessive user of the output with maximum power. It 
can effectively extend the service life of this product. (It’ s 
recommended that the speedlite should be idle for more than 10 
minutes when entering the overheat protection)
2.Long press [MODE] button to enter into trigger method selection 
interface,  and rotate [  ] to select trigger method.  
3.Short press [MODE] button to switch flash mode: ETTL/M/MULTI/Gr. 
(Gr mode can only work in wireless master mode.)
4.Rotate [  ] to adjust the selected parameters, and press [SET] button 
to confirm and save the settings. 
5.Short press [ 

] button to enter into focal length setting status; 

long press [ 

] to enter into custom setting status. 

6.Functional button 1-4 corresponding to different function according to 
current state of the flash, operation and details please refer to the 
following chapters. 
7.By pressing and holding button 1 and button 3 simultaneously, the 
flash parameters of the speedlite will be restored to default. 
8.In off status, press and hold [MODE] button, the speedlites will be 
turned on and it will enter into firmware upgrade interface.