The Fenix E01, a perfect portable mini LED flashlight, with negligible volume and weight, can be put into your purse, pocket, or simply be fastened onto your keychain. It could serve you as your reliable companion at any time. Though it is compact in volume, the Fenix E01 has amazing performances using only a AAA battery (included). You will be marveled at its excellent brightness and extraordinary long runtime, high reliability & durability, outstanding water resistance and its exquisite workmanship. All these make it become your best choice to add to a flashlight collection or to give as gift or to serve as your close companion.