Need a working faraday cage product for legacy keyfob

[brainhouston]

So that part that makes a differnece is not that it is

I'm 99% sure that it they aren't using RFID, they are using 300-400 MHz classic key fob frequencies.
RFID often ranges in inches and are mostly used for identification tags. Frequencies can range from kHz to GHz.
One source, which reviewed the FCC registration information indicated that they were on 315 MHz.

Bluetooth is 2.4 GHz.

Yeah I might have incorrectly used the term
Simply meant it's RF vs BLE