Any of the current Roku player remotes (and almost all past remotes) will work with a 3920. The only current Roku remote that won't work is the Roku simple remote for TVs.
https://www.roku.com/products/accessories
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.