I've seen a news story related to these, i think they analyzed it and found that there's antiperspirant in the pads that accumulates after a while and blocks the pores.
Wow, you guys solved the mystery. Thanks so much. Who would've thought that it would turn out to be something so obvious. Come to think of it, when i asked my neighbour before posting here, this cell phone antenna thing was the first thing he suggested but i blew off the idea :P
Thanks for the detailed replies guys. On the other side of the board there is just a rectangle in the middle, no copper portions. There is nothing inside the black housing, i just pulled the board out of in for that picture but couldn't fully get it out since the antenna were glued to the...
Now, I'm not very well versed in the engineering side of telecommunications and what-not, so i was wondering if somebody could tell me what this was, I've exhausted all other options. It was glued to a window when my uncle moved into his apartment. The black box is the size of a matchbox...