USB LED Biological Microscope Lighting Brightness Adjustable Bottom Light source For Sale

9-speed Dimming Microscope LED Light Sources Upplementary Lighting Brightness Adjustable Bottom Microscope Ring Light

9-gear button dimmer With switch +- gear, a total of 9-step to adjust brightness. USB interface can be connected to a DC 5V1A USB power adapter or a power bank. Note: The diameter of the LED light source is 45mm, 3M glue on the back. When installing, use a Low magnification objective to observe, alignment the center point (the bright spot is in the center of the field of view), then tear off the Stickers, and stick the light source on the microscope Reflector mirror of the flat side.