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 Remote review: one remote to rule them all - Reviewed
Logitech Harmony - a Hub and it's Elite, Ultimate, Companion