The LED LENSER K2 LED Flashlight is a compact and relatively powerful anodized aluminum LED light small enough to fit on your keychain. It has a white LED that produces an output of 25 lumens with a beam distance of up to 66'. The flashlight is also durable with an IPX4 water resistance to protect it from the occasional drips or splashes of water. It turns on and off through simply twisting the bezel and runs on four AG13 batteries. The K2 even comes with a keyring.