Features: This 72 LED rings light offer high brightness, uniform illuminating with adjustable polarization to minimize glare and boosts image contrast for precise microscopy tasks. Compact and lightweight at just 7.3cm in diameter, it features USB power compatibility for flexible connection to devices like computers or power banks, enhancing portability. Ideal for professional such as biologists, botanists, and scientists who rely on microscope accessories for detailed sample analysis. Perfect for scenarios like laboratory research, educational classrooms, or field observations where efficient illuminating is important for quality microscopy work. Its versatile design ensures consistent, quality lighting, making it an essential polarized light source for enhancing visibility across diverse scientific applications. Specifications: Component: Plastic Diameter: about. 7.3cm/2.87in Power supply: USB Package Includes: 1pc LED Rings Light note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.