Usage Tips:1. Ring light adopts 72 pcs monochrome LED beads, in the range of 6500K to 7000K color temperature, light atmosphere to high brightness, high uniformity of the lighting effect. 2. L72 microscope ring light source, standard DC 5V-USB power supply, global use of any adapter. 3. Compatible with a variety of microscope models, commonly used in most microscopes on the market, the largest 61mm, the smallest 41mm. Product name:Microscope polarized LED ring light LED quantity:72Pcs Power:4W Maximum illumination:39000-43000LUX range:41mm-61mm Size:78.5x78.5x26.5mm Application:For Industrial Stereo Microscopes, Digital Camera Magnifiers Color temperature:6500K-7500K Brightness adjustment:0-adjustable Support:for Machine Vision Camera Feature:USB Port Type:Anti Glare Illuminators Source Colour:Black Material:Plastic Package Contents: 1 * Microscope Ring Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.