Unknown compass sensor

I've had this compass sensor laying around for a while and wanted to use it with my UNO. The problem is I have I no clue on the working of this one and what pin does what exactly. There is no serial number or anything printed on the thing only something saying "AIR" or "AUR". I'm positive its a compass sensor because I've ordered it for a robotics projects a few years ago but the webshop I ordered it no longer has the sensor in its catalog so I can't lookup the name.

Has anyone seen something like this, knows the manufacturer or sensor name or possibly how this 2 pin compass sensor works ( What to read what to write ).

Thanks in advance!