With a sleek rechargeable design and excellent fore-aft balance, the 75-lumen Black Diamond Sprinter Headlamp is a versatile, all-weather light that's ideal for high-impact use on the trail or the skin track. A red taillight strobe in the rear adds visibility in urban areas, and the lithium polymer battery recharges through a USB port in 5 hours. The Sprinter's waterproof design keeps it going strong in any weather, and the regulated design provides constant illumination throughout the battery life.