Output: 140 lumens. 3-watt CREE LED chip. Advanced focus system - spot to flood. Integrated dimmer switch. Adjustable lamp head within 90 degrees. Fully adjustable head straps. Burn time: up to 65 hours. Effective range: 0 - 531 feet. Max watt: 2.45. Dimensions: adjustable to head size. Weight: 208 gms. Power supply: rechargeable 3 x AAA NI-MH batteries.