80-LED adjustable ring light comes with 2-7/16" (62mm in diameter) inner diameter, a 110-240V power adapter and a 1-7/8" (48mm in diameter) ring adapter. With variable intensity control, it provides cool, even, intense and focused shadow-free illumination. It is an ideal durable cool light source for microscopes. This kit comes with one year **against manufacturing defects. It is brand new in original box. Features & Specifications: 80 bright white LED bulbs Aluminum ring body construction Heavy-duty durable metal control box 100,000 hours of life Intense and focused shadow-free illumination Variable intensity control Mounting size: up to 2-7/16" (62mm) in diameter Inside diameter of ring light: 2" (51mm) Outside diameter of ring light: 4" (100mm) Power input: 110-240V, 50-60HZ, auto switching Fits up to 2-1/2" (64mm) mount rings Packing List: One 80-LED Aluminum Ring Light One Metal Control Box One 48mm Ring Adapter