3 Light Modes & 4 Brightness Levels - The dimmable LED desktop light has 3 lighting modes (warm light 4000K, mixed light 5500K, and white light 7000K) and a total of 4 adjustable brightness levels for each lighting mode. It's perfect for work, study, crafts, reading, and sleep, and is also an excellent computer light for video conferences and Zoom meetings. USB Powered - The USB multi-functional clip light is compatible with most devices that support USB ports, such as computers, USB wall chargers with a safety certification of 5V 2A or higher, mobile power supplies, and adapters. With a 1.6m long USB cable, you can conveniently enjoy long-distance power supply. Note: If the light dims or flickers, try another charger that meets certification standards. Energy Saving and Eye Protection - Made with 40 premium LED beads, the LED reading light saves more than 75% energy compared to traditional incandescent lamps, reducing electricity costs and protecting the environment. It provides soft auxiliary lighting without flicker, glare, UV, or frequent radiation, protecting your eyes and reducing eye fatigue from long-term reading. Fast Heat Dissipation and Memory Function - Made of high-grade aluminum, it achieves fast heat dissipation, ensuring a suitable working environment and a long lifespan. Also, when the power is turned off, it automatically remembers the brightness and color mode used last. Flexible Arm and Sturdy Clip - The 360° flexible gooseneck arm can be bent into any shape and angle you like, always providing the most comfortable lighting direction. With an ultra-sturdy clip and scratch-resistant foam, the reading light can be securely fixed to any surface without scratches, such as music stands, tables, computer desks, headboards, and drawing boards.