The terms ultralight and compact are redefined with the Scout headlamp. Weighing approximately 45 grams it s small enough to fit into your pocket and forget it s there. The unique hinged lamp housing allows you to direct light where you need it. Or you can easily detach the light from the head strap for use on your cap backpack strap belt or other gear. The Scout sports three levels of light output and two emergency signaling modes which are quickly accessed by a single button. Four tiny lithium coin cell batteries keep the Scout ultralight ensure reliability in extreme cold weather and pack up to 48 hours of burn time.