Transmitter/receiver needed for Speedlite EL-100 and EOS 250D

[bbenbbird4217]

I have an eos 250d and a EL 100 Speedlite and I need to buy a transmitter/receiver for it. I have no clue what to buy so any help would be appreciated
to do off camera flash and triggering the camera remotely

[deebatman316]

Yes that is true. In optical wireless the sender (formally master) speedlite has to fire so the receiver (formerly slave) speedlite can fire. If it is set not to fire it will fire before the shutter is open and it won't contribute to the flash exposure. You also meant the Flash Functions Menu and NOT the Speedlite Control Menu. Note rear curtain sync DOES NOT work with optical wireless.