The Volt 300 is a USB (Universal Serial Bus) rechargeable headlight that features quick-change cartridge battery & 300 lumen output in compact design. This light features five modes: High Normal Low Hyper Constant & Flashing. The Volt 300 can be mounted on or under the handlebars or on the helmet. Spare cartridge batteries ideal for long rides & commuting & charging cradle are available as add-on parts & can be changed safely & easily without any additional tools. Dimension: 111.5 x 31.0 x 38.0 mm Weight: 120 grams (light unit & battery) Light source: High intensity white LED X1 Light output: 300lm Run time: High mode: approx 3hrs Normal mode: approx 8hrs Low mode: approx 18hrs Hyper Constant mode: approx 11hrs Flashing mode: approx 60hrs Battery: Li-ion rechargeable battery (3.7V-2200m Ah) Recharge time: approx 6 hrs (USB2.0 recharge) 3 hrs via optional fast-charging cradle Recharge/discharge number of times: about 300 times&65288;until the rated capacity drops to 70%&65289; Other: Helmet mount sold separately CA460EL460RC