Your remote comes automatically paired with your Apple TV. If it disconnects or you get a replacement remote, you’ll need to manually pair it to Apple TV.
If your remote isn’t responding, you can reset it, then pair it again.
Press and hold remote for 2 seconds.
When the remote is successfully paired, an onscreen message appears.
Note: An Apple TV can have only one Apple TV remote paired with it at a time. When you pair a remote, any other paired remote is automatically unpaired.