In addition to using your Siri Remote to navigate the tvOS user interface and play games on the fourth-generation Apple TV, you can program it to control power and adjust volume levels of your television set or home theater receiver.
That's because your Apple TV and the Siri Remote that came with it are compatible with HDMI-CEC and outfitted with a built-in infrared receiver and blaster.
This means owners of the new Apple TV can adjust the volume of their TVs and home theater receivers via the HDMI cable or line of sight, using just their Siri Remote.
In this tutorial, you'll learn how to program your Siri Remote and configure it to work with your home entertainment equipment.