Super Bright & stepless dimmingOur headlamp delivers a crisp 500-lumen beam that illuminates up to 100 metersideal for navigating pitch-black trails or signaling during emergencies. Long press to stepless dimming, smoothly adjusting from a 10% to 100% full brightness. Unlike rigid 3-mode headlamps, its fluid brightness control prevents eye strain and extends battery life by 30% in low-light scenarios. Rechargeable & Lightweight Vavofo's Headlamp flashlight Built-in rechargeable 500mAh high-capacity battery , up to 3-7 hours working time after fully charged from any USB Port in Only 2-4 Hours.Weighing just 1.99oz (2.68 oz with headband ), its ergonomic design distributes weight evenly, eliminating neck fatigue during running or backpacking trips. The compact size slips effortlessly into glove compartments, first-aid kits, or running belts.