The hotel card we used this last Spring was a transponder type that requires a specific device to use it. There are also RFID used to identify your pet dog/cat or the farmers cow.
I told you the easiest device to use for a vast span of frequency reception is a Software Defined Receiver used with the sound card in your PC. You can program it to scan or what ever you want. Also see the received signals on a waterfall display.
Your ideal will not be my ideal, so no help there.
Paul