HTC Vive Controllers

htc-vive-controllers

Turning the controllers on or off
§ To turn the controller on, press the System button until you hear a beeping sound.
§ To turn the controller off, press and hold the System button until you hear a beeping
sound.
When you quit the SteamVR app, the controllers will automatically turn off.
Pairing the controllers with the headset
§ Once the controllers are turned on for the first time, they will automatically pair with the
headset.
The status light shows as blinking blue while the pairing is in progress. The status light
turns solid white when the controllers are paired with the headset.
§ To manually pair the controllers, launch the SteamVR app, and then go to Settings >
Devices > Pair Controller. Follow the on-screen instructions to complete the process.

From the HTC Vive Manual.