Enjoy lots of light from a small package with the Princeton Tec Fuel LED Headlamp. The Fuel now features four Ultrabright LEDs to crank out up to 70 lumens of light from a headlamp that weighs just 78 grams (with batteries). The large push button switch makes it easy to toggle between the Fuel's three light levels and flash mode, even when wearing gloves. The asymetrical single arm bracket maintains a center of gravity on the headlamp's pivoting head for easy and reliable light direction adjustment. Water resistant. Easy to open battery door with to door tool built into the headband's slide buckle. Made to give you long burntimes, the Fuel runs for 50 hours on high setting, 90 hours on medium (25 lumens), and 146 hours on low (13 lumens). Beam reaches out to 39 meters on high setting. Uses 3 AAA batteries (included). One size fits all adjustable headband.