This is the classic two-AA battery penlight flashlight that is always a handy neccesity once you've tried it. Streamlight makes a new L.E.D. version that's better than anybody else's. The super-tough tailcap switch allows momentary ON or full ON function. It has a flood-to-spot variable focus beam, and comes with 2 AA batteries. Only 3 ounces and 5.6 inches long, it also comes with a pocket clip so you can keep it in your shirt pocket. This is a great flashlight to keep in your pocket or belt holster to check pupils with or just see in the dark for safety.