1. - With built-in these led headlamps which beam of LED light in high mode, can beat other normal battery headlamp .2. LONG RUN TIME - Packed with batteries, headlights have a runtime of up to hours (on the high setting).So you will have the reliable power and light you need. The back-up light in case of outages. Also a nice camping gear!3. VERSATILE MODES - These head lamps provide light modes: main light high/ low/ strobe, wide high, all lights on, and sos, 4. INCREDIBLE VALUE - Fully adjustable head strap for comfortable wearing. The Tiltable feature can let you point the light toward the ground in front of you. 5. DURABLE CONSTRUCTION - these headlamp flashlights are the ideal head lights for outdoor adventurers.