Unfolded Circle Remote 3 - Ordering Questions - What is up Doc?s

Got the Remote 3 and Dock 3.
So I’ll get a second Dock 3.

These Docks come with one “IR blaster for Dock 3” and can support 2.

What is the IR extender with dual LEDs? It’s not the IR blaster? Is it just the LEDs built into the Dock?

Are other IR blasters able to work with the two ports? I’d like extra smaller ones to place in front of each device in a rack.

The charging or non-charging version of the Dock 3, are the same price? Both have the charging port for the remote but one comes with a cover?