Siri makes your voice

the on/off switch.

Siri knows which HomeKit‑enabled accessories you have in your home as well as their status. So you can ask Siri to turn an appliance on or off, dim your lights, change the song, set one of your scenes, or play movies and music on your AirPlay 2–enabled TV from your iPhone or iPad. With Apple TV or HomePod, you don’t even have to be home — for example, you can ask Siri to set the “I’m Home” scene while you’re driving. When you arrive, your house will be bright and warm, waiting for you to settle in.