Yongnuo YN-E3-RT Speedlite Transmitter is directly compatible with the Canon 600EX-RT flash, Canon 430EX III-RT, and a Yongnuo YN600EX-RT flash unit with built in wireless receiver. It supports all the features of the Canon ST-E3-RT, as well as few extra features.

The YN-E3-RT Wireless Speedlite Transmitter for Canon from Yongnuo is a 16 channel, 5 group wireless triggering device with a 100m 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