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 Elite Universal Remote, Hub, Z-Wave Extender, & 2 IR Extenders 97855117007 | eBay
Logitech Harmony Hub Teardown - iFixit
Logitech Harmony 950 Infrared Remote Control and Wired Remote Control Extender | Groupon
Amazon.com: Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) : Electronics
Amazon.com: Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) : Electronics
Logitech Harmony Elite Universal Remote, Hub, Z-Wave Extender, & 2 IR Extenders 97855117007 | eBay
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
Amazon.com: 2-Pack Infrared IR Mini Blaster (Emitter) Extender for Logitech Harmony Smart Control Remote, Add or Replace an IR Mini Blaster : Electronics
Logitech Harmony Accessories
Home Hub Extender
Logitech® Harmony® 900 Universal learning remote with web-based setup at Crutchfield