Human: How do I sync a replacement remote to my Roku? Assistant: 
Sync a Roku Replacement Remote
1. Install the Roku app on your phone or tablet.
2. Turn on your TV and Roku.
3. Open the Roku app and select your Roku.
4. Tap Home on the Roku app and select Settings.
5. Select Remotes & devices and then Set up a new device.
6. Select Remote.
7. Insert batteries into the remote.
8. Point the remote at the Roku to pair (if it's an IR remote).
9. If it's an enhanced remote, press and hold the pairing button under the battery cover until the lights flash to pair.