The storm-proof Sprinter 275 Headlamp is a well-balanced, USB-rechargeable headlamp purpose built for longer distance running in dark or low-light conditions. It features a perforated elastic headband for improved breathability, a red tail-light strobe that can be turned off or on separately depending on where you are running, a multifaceted optical lens that provides brighter light, a 6-level LED battery meter, a Brightness Memory and the ability to change the brightness on the fly with PowerTap™ technology. Can be run on the included rechargeable battery or standard AAA alkalines.