Features: The Volt300 is a USB rechargeable headlight with a 300 lumen output and quick-change cartridge battery. The Volt300 is a USB rechargeable headlight that features quick-change cartridge battery and 300 lumen output in compact design. This light features five modes: High, Normal, Low, Hyper Constant and Flashing. The Volt300 can be mounted on or under the handlebars or on the helmet. Spare cartridge batteries, ideal for long rides and commuting, and charging cradle are available as add-on parts and can be changed safely and easily without any additional tools. Tech Specs: Dimension? 111.5 x 31.0 x 38.0 mm Weight? 120grams(light unit and battery) Light source? High intensity white LED X1 Lightoutput? 300lm Run time? High mode? approx 3 hrs Normal mode? approx 8 hrs Low mode? approx 18 hrs Hyper Constant mode? approx 11 hrs Flashing mode? approx 60 hrs Battery? Li-ion rechargeable battery (3.7V-2200mAh) Recharge time? approx6 hrs(USB2.0 recharge),3 hrs viaoptional fast-charging cradle Recharge/discharge number of times? about300 times?until the rated capacity drops to 70%? Other: Low batteryindicator, lighting mode memory function. Helmet mount included