Features: Luminus SST20 Cold White LED with a lifespan of 50,000 hours. Built-in 320mAh Li-polymer battery. Hidden micro USB charging port. Metal switch for on/off and output selection. Instant Burst. High-efficiency lens with a total reflective coating. Made of durable A6061-T6 aluminum. Premium type HAIII hard-anodized anti-abrasive finish. Specification Max Lumens: 400 Max Beam Distance: 210 feet ( 64 meters) Max Runtime: 30 hours Lighting Modes: 4 brightness levels including Burst mode Bulb Type: Luminus SST20 Cold White LED Lens Material: Polycarbonate Size: Length: 2.68” (68mm) Head: 0.60” (15.3mm) Body: 0.59” (15mm) Weight: 0.85 oz. (24g) including battery Battery: Built-in rechargeable 320mAh Li-polymer battery The Fenix E05R Keychain Flashlight is a great flashlight to carry every day. Less than 3″ long and less than 1″ round, this flashlight only weighs 0.85 ounces (24g) making it a light weight option for your keys, pocket or purse. Four brightness levels are accessed by pressing the side switch, and when you need extra power, hold the switch down for a quick burst of a very bright 400 lumens. The built-in battery can be quickly charged by unscrewing the head to reveal the micro-USB charging port. Built for any situation, the Fenix E05R Keychain Flashlight is built tough, making it impact resistant, dustproof and waterproof. Trust this mini flashlight for your every day needs. 24 Months Local Manufacturer Warranty Store in a cool dry place. China