The Fenix E01 flashlight is one of the most compact keychain flashlights available. It provides over 20 hours of continuous light on a single AAA battery. It's easy to carry and can be used as a convenient keychain. The Fenix E01 also makes a useful and reliable gift. You can choose from five different body colors. Furthermore, the E01, like all Fenix flashlights, is IPX-8 waterproof and features an aircraft-grade aluminum body with a Grade III anti-abrasive coating. Features Nichia white GS LED with a service life of over 100,000 hours; The model weighs only 14 grams; Turn on by turning the head; Can be placed on a flat surface like a candle; Protection against incorrect installation of batteries; Maintaining constant brightness with the help of a special controller. Specs Size: 2.8" (Length) x 0.56" (Diameter) Weight: 0.5 ounce weight (excluding battery) Accessories: Key ring and spare o-ring