Chromo Inc CI55000230 Macro Ring 48 LED Power Light for Canon, Sony, Nikon, Sigma Lenses The Chromo Inc Macro Ring 48 LED Light is compatible with nearly all SLR cameras 3 Operation Modes - Whole light, Half Right Light and Half Left Light Powered by 2 AA Batteries or AC Adapter (Batteries and AC Adapter need to be purchased separately.) LED Ring light comes with 6 different size Adapter Rings Chromo Inc Macro Ring Light has two switches. One on the hot shoe mount for On/Off and Power Source. There is another switch on the Ring Light for Lighting Mode - On/Half Left/Half Right