Here is the remote for the OM-1. It's Bluetooth and a quick and easy configuration. I could do it lol.
There is also a cable connection if needed.
The cable is of high quality. I've noticed that the wired remote also works with the Canon R series cameras. It does not have to be turned on to use via cable. The unit did not work with a Bluetooth connection to the R7.
The custom remote allows me to reconfigure the record button on the camera to another item such as focus stacking.
Pricey but pleased!