Michael I.
How to turn the controller on or off, and does it have a dedicated power button?
The controller does not have a dedicated on/off switch. Power management is primarily handled using the Steam button (also known as the GUIDE button). To turn the controller on, press the Steam button during the pairing process. To turn it off, press and hold the Steam button until the pairing LED goes out. Additionally, the controller will automatically power off after 90 seconds if it's not paired, or after 15 minutes of inactivity.