Used Yongnuo YN-E3-RT II On-Camera Flash Speedlite Transmitter for Canon Cameras in good overall condition. 

The external cosmetics of this transmitter shows no glaring scuffs or scratches. The battery terminals are clean and free of any corrosion and still powers on normally. 

All buttons, dials and, switches appear to be responsive. and the hotshoe electrical contacts communicate normally with compatible cameras. The photos in this listing are of the exact item we are selling.

Additional description from BH Photo:

The YN-E3-RT II Wireless Speedlite Transmitter for Canon from Yongnuo is a 16 channel, 5 group wireless triggering device with a 328' range. The transmitter offers E-TTL II/E-TTL autoflash, manual flash, stroboscopic flash, auto external flash metering modes as well as 1:8 flash ratio control.

Convenience features include flash exposure lock, AF beam focus assist, modeling strobe and 9 custom functions. The YN-E3-RT II transmitter will run for 10 hours of continuous use on AA/LR6 alkaline batteries. A power saving function shuts the unit down after being idle for 5 minutes to conserve batteries. The YN-E3-RT II also supports firmware updates to make it future-proof