You can now pair Bluetooth-enabled devices such as wireless headphones and third-party MFi controllers with your fourth-generation Apple TV. Here's how:
1. Using your Siri Remote open the Settings app.
2. Select Remotes and Devices > Bluetooth
3. Turn on your Bluetooth device and put it in pairing mode.
4. Click on the name of your device when it appears under Other Devices. This should make your device pair with the Apple TV.