How-To: Set up the Logitech® Harmony® Hub with Remote Buddy and control 100+ Mac apps with the Harmony® Smart Control / Companion / Ultimate / Elite
Amazon.com: Logitech Harmony 665 Advanced Remote Control, Universal Entertainment Remote, Replaces up to 10 remotes with Guided Online Set-up and Interactive Help (Renewed) : Electronics
Logitech Harmony Companion Software Download & User Manual
Harmony Hub
Harmony Smart Control™ User Guide
Alexa can control your TV with a Logitech Harmony. Here's how - CNET