OK42B 26 LED Ultra Thin Digital Microscope LED Ring Light ,USB 5V LED,light Illuminator Adjustable Focus Lamp Source for Monocular Binocular Trinocular Stereo Microscope Ultra thin to save the inspection space. Part number: OK42B Dimmable LED Microscope Lamp Light source: 26pcs led ring lights, the brightness is adjustable. Input voltage:Standard USB DC 5V, Color temperature: 5500k-6500k Power consumption:4-6W Light intensity adjustment:0-100% Installation interface: M42*0.75 Ta:-20~+40℃ Package includes: 1* microscope led ring light 1* adaptor