USB Cable for Logitech Harmony 600 650 700 Remote Controls 993-000321
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Harmony Software
Logitech Harmony 600 Remote, Tested, Turns On.. AS IS | eBay
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