Lightweight, compact and engineered to withstand extreme condition and use. This bright LED cap light has 5 ultra bright white LED bulbs inside. Powered by 2 pieces lithium coin cell batteries. The fresh batteries can last 48 hours high intensity burn time continuously using. The life of the LED's is more than 100,000 hours. This LED cap light is also water resistant, shock proof. Attaches to the cap for the most practical, hand-free light source are available. It is ideal for detail working, mechanical man, hunting & training, camping and more.