Question for Wrath pens

I have been told, and tested it and found it to be true, that if you are out of range for your car locking key fob thingmy, you point it at your head and it will work.
How's that then? Is it using your body as an aerial or owt?
I thought they were I/R snd worked on line of sight

Posted By: CB41, Nov 12, 18:52:00