Three LED"s and a high pressure Xenon bulb, ALL IN ONE. This headlight features a shatterproof and shockproof body that is water resistant. It operates by either the 3-5 mm LED"s (10 year life) or the focusing Xenon bulb (3V 0.3A). The headlight also comes with an adjustable 1" head strap. Uses 3 AAA batteries (not included). Estimated battery life: 240 hrs. using 1 LED; 80 hrs. using 3 LED"s; 3 hrs. using Xenon bulb.