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 Instant Burst for 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.