The Fuel 4 is designed to meet the widest range of applications while remaining small, lightweight and robust.General use headlamp, not specifically intended for cyclingNow with Four Ultrabright LEDs that deliver 43 lumens50 to 146 hours of burn timeAsymmetrical single arm bracket that makes directing the light effortless and reliableLarge, easy to find push button switch and a virtually bulletproof, easy access battery door that protects the 3AAAs and its electronicsWeighs only 78gItem SpecificationsWeight78gBattery3 AAABulb4 Ultrabright LEDsRun Time146 Hours