Amazon.com: Logitech Harmony IR Extender System - Black (Discontinued by Manufacturer) : Electronics
LOGITECH HARMONY IR EXTENDER SYSTEM NEW - NEW in Sealed BOX + I SHIP FASTER!! | 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
Logitech Harmony IR Blaster
New Harmony 600 and Harmony 650 Remotes Debut | logi BLOG