Now more powerful than ever before, the Princeton Tec Fuel LED headlamp features 4 ultrabright LEDs capable of handling any outdoor adventure. The unique single-arm ratcheting head pivots up and down, providing full range of motion. Easy to use push-button switch. Powered by 3 AAA alkaline batteries (included). Illuminates up to 35m on high. Power: 43 lumens. Burn time: 50-160 hours (high-low). Water resistant.