This Halogen Focusing Headlight features a small, unobtrusive illuminator that provides 10 watts of intense halogen light at 3250o K. It projects a light beam that easily focuses from a small 3/4" spot to 4" spot with no shadows. The flexible, conforming headband adjusts easily and has a soft, durable silicone rubber forehead cushion pad. It weighs only 4 ounces. The headlight is powered by a 120 or 220/240 volt plug-in transformer with a 16-foot, low voltage (6 volt) power cord. A lightweight, rechargeable battery pack is also available which lasts for approximately 1 hour and recharges overnight. Many repair parts are available.