When the US Military makes a request, Princeton Tec takes action. The Remix Pro is powered by a single CR123 battery providing excelled performance in cold weather as well as light weight. This headlamp has multiple output levels to meet any situation, and it always starts in low mode to ensure light discipline. Combining these features with a large on/off button, an easy access battery door and a stable asymmetrical bracket, Remix Pro is equipped to endure the rigors of anything you get into.