Thinking of Used Reactor 900 - Advice?

[Yar36]

Hi!
I have a set of Phantom Golds, and found a good offer for a pair of used Reactor 900’s.  I’m not very familiar with them, so I’m hoping someone from this forum might be able to help...

Are there different generations of the Reactor 900s? (Do they all have wifi, airplay, etc.?)
Can they work in sync with the Phantom Golds? (Like multi-room speakers)
Anything else i should know?

Thanks so much for your help!!!