Black Diamond's powerful, adaptable and lightweight running headtorch. The Sprinter 500 has a 500 lumen max output and is dual fuel compatible. It features a simple one button interface for quick brightness adjustment and has a perferated headband for breathability, as well as a removable top strap for extra stability. The device also features reflectors and a rear red flasher for extra visibility on roads and trails. A very well thought through device and a fantastic piece of kit for avid runners.