Amazon.com: Harmony: Alexa Skills

Use Amazon Alexa with your Logitech Harmony hub-based remote to start and stop Harmony Activities, change channels, control volume and play/pause your content. Use your voice to jump to your favorite TV station or directly into a Roku channel. For example, say “Alexa, turn on the TV” to power on your TV, AV receiver and cable box and set them …

https://www.amazon.com/Logitech-Harmony/dp/B01M4LDPX3