The USB (Universal Serial Bus) rechargeable Volt 100 headlight features a 100 lumen output & three modes: High Low & Flashing. Handlebar & helmet mountable the Volt 100 is compact & easy to remove from the bracket so you can take it off at your destination & stash it away until the ride home. The smartly designed bezel provides excellent side visibility. The Volt 100. Designed for Urban Riding. The new standard in urban bike lighting. The USB (Universal Serial Bus) rechargeable Volt 100 delivers a constant 100 lumen output to see by & flashes at an ultravisible 150 lumen when you really need to be noticed!• USB (Universal Serial Bus) rechargeable front light with up to 150 lumen output• Integrated Li-ion battery• Side visibility• USB (Universal Serial Bus) recharge• Flextight handlebar bracket• Modes: High / Low / Flash• Runtimes: 2Â-30 hrs depending on mode Dimension: 34.0 x 90.0 x 35.0 mm Weight: 65 grams (light unit & battery) Light source: White chip LED X1 Run time: High mode (100 lumens): approx 2hrs Low mode (30 lumens): approx 6hrs Flashing mode (max 150 lumens): approx 30hrs Battery: Li-ion rechargeable battery (3.7V-800m Ah) Recharge time: approx 3 hrs (USB2.0) Recharge/discharge number of times: about 300 times&65288;until the rated capacity drops to 70%&65289; Other: Low battery indicator. Lighting mode memory function. Helmet mount (optional)