Caavo allows you to switch channels using your voice. Just press the microphone button on your remote and say "Watch..." followed by the name of the station or channel number.
Caavo will only automatically tune to a channel if it can find an exact match. For better success in getting the right channel to automatically tune, try using the channel number instead of the call sign, or the complete channel call sign. For example, you might try ESPNHD instead of ESPN.
You can also navigate the guide on your cable box using your Caavo remote, just like you would use the remote that came with your cable box.