does the remote work with rf or ir ?

I am considering putting it out of site behind the TV mounted to the wall... Please advise your thoughts

Tx, Michael

Which Apple TV are you referring? The newest Apple TV has a Siri remote which uses both Bluetooth and IR. However, the IR is only used to communicate with the TV/amp. But you can still use a third party remote (i.e. Harmony one) to control the ATV4 itself...

I believe the older ATVs uses IR...

bluetooth and ir

Siri Remote

Bluetooth 4.0 wireless technology

IR transmitter

from https://www.apple.com/tv/specs/

What is your real question? What are you trying to do or considering?