I have not a clue where this came from.  Possibly attached to a larger holiday gift or as a give away.  When used, the LED emits a pretty bright blue, great for seeing the lock you’re trying to open with your keys.  But I never got the concept of having this as your keychain and having to fumble with it as you’re trying to open your door.  Plus, every cell phone has some kind of flashlight app, so I’m covered.