It is the headband light. For anyone that has ever tried to do plumbing under a sink with a flashlight propped up against a box of tampons, there is no greater invention. In fact, I just used it to replace a light fixture in a windowless (and tampon boxless) foyer. It's much easier to connect white to white and black to black when you are not in complete darkness. Even if it's just a kid wanting to play "coal miner" or absconding it for flashlight tag, the uses never stop. It is like having a 3rd hand holding a flashlight. Now, if someone could just invent something to be a 4th hand to scratch my nuts when my other 3 hands are tied up under the sink.