Specifications:Power input: 90-240V, 50-60HZInside Diameter of Ring Light: 63mm/2.5inOuter Diameter of Ring Light: 95mm/3.7inItem Size: 9.6* 9.6 *2.8cm (L*W*H)Item weight: 65g / 2.3ozPackage Information:Package Size: Approx. 20.3 * 14.5 * 5cm / 8 * 5.7 * 2inPackage Weight: Approx. 290g / 10.2oz / 0.64lb Overview:The 56 LED ring light is designed especially for stereo microscope, and is an excellent companion to various kinds of microscopes and camera. It can offer an optimum amount of lights to the microscope or camera when additional light sources are required or there was not enough light! Inspection and quality control is no longer a problem to view surface defects and overcome the visibility problems related. It can also be used as light source for cameras to focus while hunting viewing in dark places or areas.Features:*56 LED adjustable compact microscope ring light.*56 bright white LED bulbs, variable intensity control.*The brightness of 0-100% adjustable, high brightness.*100,000 hours of life. Suit for the dia of the lens: 30mm-63mm*Power input: 90-240V, 50-60HZ.