Connecting a Bluetooth game controller or other compatible accessory to the fourth generation Apple TV makes it possible to expand the system's capabilities. The Siri Remote is already connected to the Apple TV using Bluetooth 4.0. To pair additional remotes or other Bluetooth devices, follow these steps:
1. Navigate to Settings -> Remotes and Devices -> Bluetooth
2. Enter pairing mode on the Bluetooth device to pair
3. Select the Bluetooth device after it appears on Apple TV under Other Devices
Once successfully paired, tvOS will remember the paired Bluetooth devices and automatically connect when the Apple TV is in use.