E3A keychain LED flashlight LED: Samsung LH351BMax output: ANSI 100 LumensMax runtime: 100 minutesMax beam distance: 37 metersMax peak beam intensity: 350cdWaterproof: IPX-8Impact resistant: 1 MeterBattery: Uses 1xAAA 1.5V Alkaline , 1xAAA 1.2V Ni-MH or 1xAAA 1.5V LithuimRated Range: 0.8V ~ 2V Color:Slate blue (Type III anodization) / Royal blue / Carmine red / Carbon black Dimension:Length 59.5 mm / 2.34 inchHead diameter 14.0 mm / 0.59 inch Weight: 7.5 g / 0.26 oz (without battery)Included: 1x E3A, 1xAAA Alkaline battery, Keyring, Operator’s manual, Spare O-ringOptional: Key holder Operation Battery installation: Insert the battery positive pole toward the light head, otherwise it will not work.When the light turning on, the beam is directed away from the eyes.Take out the battery if you are storing the flashlight for a long period of time to prevent the battery from leaking. Flashlight turning on/off:Fully tighten the tube/tail to turn the light on.Twist the tube/tail to turn off the light. FeaturesPowered by a convenient and widely available single AAA battery producing an output of 100 lumens.Made by durable aluminumExtremely easy carry: Barely know it is there with its lightweight and small size.Waterproof to IPX-8 StandardTIR optic lens producing a soft and balanced beam for comfortable use.