Canon ST-E3-RT Speedlite Transmitter
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Note: This transmitter requires 2 AA batteries to operate and they are NOT included. Not all transmitters come in their original pouches.
The Canon's ST-E3-RT Speedlite Transmitter
is a radio frequency remote flash trigger that sits on your hotshoe and is weather sealed. Its radio-controlled two-way wireless transmitter can control up to 5 groups, or 15 Speedlite 600 EX-RTs, up to 100 feet away. Its clearly laid out LCD information panel matches the setup of the Speedlite 600 EX-RT, making it easy to navigate the settings of both.
This transmitter does not have optical functionality and is not compatible with older Speedlite models.