The LED Lenser K1-L features a unique light ring around the bezel, which makes it both fun and functional to use. The light is run by four button cells which can be replaced easily. It is a perfect edc for your pocket, purse or a child's backpack. Just twist the rotary switch on the head of the flashlight to turn it on or off. The K1-L LED flashlight features solid but lightweight construction from anodized aluminum.