Amazon.com: Harmony IR Adapters, Ancable 2-Pack 2.5mm Mono Plug to 3.5mm Mono Jack Connector for Logitech Harmony Hub and IR Blaster, IR Emitter Extenders, IR Repeaters, IR Receivers : Electronics
Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) : Electronics - Amazon.com
Does Logitech Harmony RF Wireless Extender work with Harmony One? | AVForums
Logitech® Harmony Hub Smartphone Control
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Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) : Electronics - Amazon.com
Amazon.com: Harmony IR Adapters, Ancable 2-Pack 2.5mm Mono Plug to 3.5mm Mono Jack Connector for Logitech Harmony Hub and IR Blaster, IR Emitter Extenders, IR Repeaters, IR Receivers : Electronics