I've a lifelong habit of staring at the ground as I walk and picking up random stuff. Today, I found this thingy. Initially I thought it was a data stick, but it's not. Husband thinks it's medical as he thinks he can see a needle within. Anyone care to enlighten me? (Life is a bit boring at the moment). The blue bit comes off like a cap, and there are two small rectangular slots in the bottom of the black end like this - - . It's not letting me post the pictures. I'll try in the next post.