Nikon D750 Dual Macro LED Ring Light/Flash (Applicable for All Nikon Lenses) Nikon i-TTL Iteration (Dedication) Elevated Color Render Index 95% (Scale 0-100%) | Brighness (1020 lux at 0.5 meter) | Color temperature (5500k200k). Three (3) Brightness Levels: 1/4,1/2 & 1/1. Auto Focus Assist (Depress Shutter Activates AF-Assist Lamp For Easy Focusing) AF-assist lighting Power: 4 AA Batteries