HELP!how can i do the Quickstart?

i bought 2 reach, but now i dont know how to connect them.
i want to know, when i act with the Quickstart, how to connect them?

Q1: do i need 2 3DR radio for each reach for a long distance application?
Q2:when i do the steps with the Quickstart, how to connect the 2 reach?
if one reach connected to my laptop with USB and another powered by a power bank?
Or the two reach are connected to my laptop at the same time when i do the Quickstart


See these links:

now i have understood how to use it, really thank u for your help!

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