A Roku stick is a variety of Roku streamer with an HDMI plug that allows it to be plugged directly into the back of the tv without using an HDMI cable.
I think you're asking about an additional remote control. So we can best advise you, please provide your Roku model and model number (found via Settings > System > About).
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X