Hey @rinkadink1
Thanks for posting here in the Community!
To find the most compatible remote for your Roku Streaming Stick 3810R, we recommend visiting our Product page here: https://www.roku.com/products/accessories. Once done, enter your model number (3810) on the 'Search by device' box located at the right-hand side of the screen. The page will show you accessories and remotes compatible with your stick.
I hope this helps!
All the best,
Kariza
Kariza D.
Roku Forum Moderator