Mystery tracker?

Hi, I just received a headlight unit for an 1199 from a breaker. When I opened the box I thought the thing had melted! Instead it turned out that someone had banjaxed a small box with some sort of incredibly sticky substance to the under side of the headlight. This stuff had decided to flow everywhere including some of the connector sockets. After about two hours of scraping and cleaning I finally got most of the substance gone and found this:

Any info gratefully received. I assume it’s a tracker but other than that I have no clue