The Automatic Ring Light Macro Flash is the convenient and creative lighting solution for copying documents, medical, dental, nature and small subject photography at short working distances where built-in and conventional flash units are hard to use. Utilizing a circular tube as its light source for just the right amount of illumination, in certain situations, it might even be the only way possible to light your subject
Full Brightness Distance Approximately 1 inch to 9.75 inches Color Temperature: 300k Power Source: Ac adapter, built in, long life lithium polymer battery Available adapter rings: 52, 55, 58 and 62 mm rings Power Indicator with 3 modes: Full Charges, half charge and empty. Measurements: 3.65l X 4.50h x 0.75 w Weight 3.25 oz (90g) without an adapter.