Key Chain LED Super bright LED light with slide On/Off switch, complete with batteries, imported. Blue plastic case, with blue LED light buld. Super, bright in a smalll, handy package. Entire light is about the diameter of a US quarter and 1/4" inch thick. Battery is a readily available size and lasts for hundreds of hours. Put one in your Survival Kit, attach to your Backpack Zipper tab, or store it with your spare tire in the car. Non-Toxic, may be held between teeth for hands free use.