Specification: Material: Plastic Weight: 254g/9oz Color & Plug Type & Voltage: (Optional) #01 White, EU Plug 110-220V #02 White, US Plug 110-220V #03 Black, EU Plug 110-220V #04 Black, US Plug 110-220V Interface size: 64mm Inner diameter: 64mm Outer diameter: 92mm Brightness: more than 18000LUX Dimming: luminance 0100 percent Working distance: 40-250mm Power: 4.5W Input: 90V-240V Output: 12V /0.5A LED Light Beads Quantity: 144pcs Power Adapter 12V /0.5A Size: Approx. 12.5 x 9.2 x 3cm/4.9 x 3.6 x 1.2inch Package List: 1 x LED Ring Light Lamp 1 x Power Adapter - 144LED Ring Light-The 144LED ring light is designed especially for stereo microscope, and is an excellent companion to various kinds of microscopes and camera. - in Use-LED Ring Light Lamp is made of high quality LED bulbs and plastic material, not easy to damage, in use. - 0100 Percent Adjustable-Intense and focused shadow- illumination. The brightness of 0100 percent adjustable, high brightness. Inspection and quality control is no longer a problem. - Optimum Amount of Lights-The LED Ring Light Lamp can offer an optimum amount of lights to the microscope when additional light sources are required. LED Ring Light Lamp can also be used as a source for cameras to focus while hunting in dark places or areas. - Application-The LED Ring Light Lamp is widely used in stereo microscopes and cameras auxiliary lighting, very practical.