Powerful 144 LED beads: the circular LED arrangement provides strong, adjustable lighting for detailed work such as soldering, inspection, watch repair and biological observation and ensures optimal illumination of the work area. Shadow reduction for clear vision: Designed to create an even, shadow-reduced light field that allows for more accurate viewing under magnification and helps you safely detect fine flaws and subtle features. USB compatible and cool in running: Powered by USB on any 5V port for convenient setup with chargers or power banks; the efficient construction stays cool and provides pleasant, eye-friendly light for a long time. Specifications and packaging: suitable for most microscopes with an inner diameter of 60 mm, including stereo and single microscopes; black plastic surface, dimensions 5 x 9.5 cm. The packaging contains a ready to use beacon. [Measure before purchasing] Please check your own size chart and not Amazon's size chart; make sure the inner diameter of your microscope is 60 mm and confirm the dimensions for compatibility.