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 Streaming Stick +, 3810X, Ser YH0059427035, wifi - Samsung UN55ES6100
- Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T
- TCL Roku TV 43S425/C107X, Ser X000001R60KV, wifi