You can set up a replacement Voice Remote for a Chromecast that has already been set up.
- Turn on your Chromecast.
- On the back of your Chromecast, press the button.
- Insert 2 AAA batteries in your new voice remote.
In most cases, your remote will pair automatically after you insert the batteries. If it doesn’t, follow the steps on the TV screen, or press and hold the Back and Home buttons on the remote for 3 seconds.