The remote control does not have a built-in microphone, so direct voice control is not supported.
However, you can use the Roku mobile app (iOS/Android) for voice functions. Make sure your phone and projector are on the same Wi-Fi network, open the app, and connect to your device. You can then use the app's voice search feature to find content, launch apps, and more.
Note: This product does not support direct integration with Amazon Alexa or Google Assistant.