"Provides cool, bright white light that is ideal for a variety of office-based procedures. Weighing approximately six ounces, it is extremely comfortable to wear for simple and complex procedures. Supplies bright, white, shadow-free light for true tissue color. Rechargeable battery pack makes this a completely portable, compact unit that allows freedom of movement. Enjoy the flexibility of operating the headlight using the direct power source or the rechargeable \"belt-clip\" portable power source. Solid state lamp has 10, 0000-hour life expectancy with minimal degradation of light output."