This makes it significantly brighter than the flashlight function of many smartphones. No more annoying cables: The lamp is conveniently charged via the integrated, fold-out USB-A interface. With its compact housing made of brushed aluminum, the K4R combines high-quality appearance and feel. This makes it ideal as an elegant and practical accessory for your keychain. Ultra-compact keychain light with up to 120 lumens of light output High-quality housing made of brushed aluminum with snap hook for easy attachment Simple and quick charging via fold-out USB-A interface without a separate charging cable Integrated battery and charge level indicator Practical transport lock protects against accidental switching on