What is it #1

In an effort to engage myself in more photography, I thought I'd start a series called "What Is It?" where I post pictures of things that I don't know the name or function of.

This is something that I saw hanging from some power lines while stopped at a red light (Folly and Maybank if you're curious, but I've since noticed these at other places). The cables going into either end suggest to me some kind of monitoring device, but I could be wrong. If you happen to know what it is, by all means leave a comment and enlighten me.

What Is It #1