The Minimus Vision headlamp features a specially selected high-efficiency LED that emits warm incandescent-like light that's excellent for penetrating dust and fog while providing the same extended runtime as our other LED headlamps. Its smooth wide beam is optimized for your field of view, output is adjustable from 0 to 75 lumens via the knurled right-hand control dial, and its warm-colored light is soothing to the eyes. A red filter (included) gives you the option of low-signature light that helps preserve dark-adapted vision. Also included is an integrated long-running SOS beacon for emergencies. A comfortable but strong fine-mesh headband features a moisture wicking Breathe-O-Prene forehead pad for added comfort. Minimus Vision runs on a single 123A battery contained within the left-hand tilt-control knob, and the battery access cap features a short leash to prevent loss.