how do reveivers work?

FDS

Elite member
That’s DSM2, which won’t bind with some DSMX modules or TX’s. It’s OK on Spektrum or the US version of the TX6I.
It looks like Hobbyking is on back order for the TX6I in all its forms, until May. That’s their one flaw, stock.
How much of a hurry are you in? They do come up for sake second hand.
If you are in a rush to fly your plane and don’t care about binding your quad to the same TX then a Flysky FS6i is easier to get and cheaper, plus some ship with a receiver included. The menus are fairly similar and it has dual rates and expo on.
Don’t buy anything until you decide what you want from a TX.