Take charge of the night! The HeadLux 100 USB features convenient cable-free charging with a direct USB port plug. Two super bright 0.5W white LEDs provide up to 100 lumens with three light modes. Bi-directional tool-free mounting and removal is accomplished by a single silicone strap, making it suitable for mounting to handle bars, forks or helmets. Great as an urban "be seen" light, or as a secondary, back up unit. Simple to use and a great value.Max 100 lumens outputIPX6 water / dust rating69 x 43 x 22mm32 gramsCharging / low battery indicator3 modes: Constant High (1.5hr) Constant Medium (3.3hr) Blinking (40hr)