Yongnuo YN686EX-RT is a professional flash lamp with high power and high-performance power supply. The lamp has a built-in receiver that allows radio communication system Canon RT. Kit version in a set is also the battery and ładowaka. 
lamp reporter YN686EX-RT characterized by a flash guide number of 60 (ISO 100, 200mm). Its high power combined with the innovative power system ensures the readiness to act in any situation. Use of a dedicated battery can double-charging time in the text compared to the other flash that class. Moving burner with automatic (and manual) lens, reflector and diffuser allow for creative lighting selection to the existing scene. 
Yongnuo lamp is equipped with a mode sync speed (HSS to 1/8000 s) and automation system selection FV ETTL, extremely useful in variable lighting conditions. Autofocus assist lamp accelerates focusing in the dark. 
Easy to read LCD display with backlight and intuitive and feature-rich menu provide comfort. You can enable and disable audio information about the charged and ready to re-flash. 
Built-in YN686EX RT trigger enables radio communication with lamps Canon Yongnuo RT and RT. The lamp can be used as both a unit of “master”, the control operation of the other aforementioned lamps and the receiver in the “slave”. RT wireless communication system allows control of four groups of lamps 15 channels, maintenance TTL auto flash mode, a manual mode and a strobe. 
YN686EX-RT can also be used in the system of optical triggering the flash transfer of automation. As the control unit can control lamps and Yongnuo Canon EX-series (with the exception of model YN585EX). In the “slave” YN686EX-RT can receive the optical signal from the lamp Canon and Nikon. The lamp can also be triggered flash in manual mode S1 and S2. This allows the primary wireless communication with almost all flash units on the market. 
The device can also be controlled wirelessly via radio external triggers, such as Yongnuo YN622 and RF603.