PREMIUM DESIGN : Ledlenser K4R keyring torch is ultra compact, yet powerful, the bright 120 lumens provides a burst of light when you need it ENDLESS BENEFITS : The K4R keyring light has been designed with a transport lock to prevent accidental battery drain & can be easily attached to a keychain, bag, or purse ADDITIONAL FEATURES : The fold out USB-A allows quick, reliable charging, K4R rechargeable LED key ring torch provides a luminous flux range of up to 30 meters & features a convenient battery charge indicator PREMIUM LIGHT : Ledlenser K4R provides (low power) 20 lumens for 3.5 hours, (standard power) 80 lumens for 1 hour & boost mode (120 lumens) LONG LASTING BATTERY LIFE : Ledlenser K4R super bright LED keyring torch will produce up to 3.5 hours of lighting with one charge, keeping light strong while you focus on the task at hand