The fourth-generation Apple TV comes with the Bluetooth 4.1-connected Siri Remote. Not only does it have some fancy functions when it comes to Apple's new set top box, but it can also control your television's power and volume, and if you have a TV that's HDMI-CEC-compliant, it can automatically switch inputs, too.
If your television supports HDMI-CEC (HDMI Consumer Electronics Control), you should be able to automatically control power, inputs, and volume after setting up your Apple TV. I've had mixed luck with this in my real-world testing—I can control power and volume, but haven't gotten input-switching to work.
If you're using an older TV, or your Apple TV didn't automatically set up your remote for you, you'll have to teach your TV how to recognize it.
- Go to Settings > Remotes and Devices.
- Under Home Theater Control, enable Turn On Your TV with Your Remote.
- Go to Volume Control.
- If the options are available, you can select Auto or TV via IR. If not, click Learn New Device to map your Siri Remote to your television.
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