Reddit reviews Original Logitech Ir Mini Blaster (Emitter) for Logitech Harmony Smart Control Remote

harmony hub <-- 3.5mm <-- cat5 <-- living room wall

upstairs wall <-- back to 3.5mm <-- 2.5mm <-- blaster

A wired IR emitter attaches to the back of the hub. You run it to inside the cabinet so any IR devices can see the signal. They call it a mini blaster.

Yes.

Harmony IR Blaster $17

You can connect 2 IR blasters and the hub itself is an IR blaster.

You can use a kit like this to extend the IR blaster/sensors.

This would connect to the second IR plug on the harmony hub as you still would want the IR blaster in your rack as well.

So get a second IR emitter

https://www.amazon.com/Original-Logitech-Blaster-Emitter-Harmony/dp/B00ITEPKIG

something like this but unless you have the hub in an enclosed cabinet you really don't need it