3 LIGHTING MODES & 10 BRIGHTNESS LEVELS: The LED clamp light is equipped with 3 color temperatures: warm light (3000K), warm white light (4500K) and white light (6500K). Each light mode has 10 levels of brightness dimming. A total of 30 lighting modes for all your needs. Depending on the intended use, you will always receive the most suitable light color. EYE PROTECTION: Semlos kids reading light made of high quality 24 LED chips provides ghost-free and flicker-free light. The light from the book does not tire the eyes, even if they stay in the light for a long time. Designed to help readers and workers protect eyesight and reduce eye strain. Great gift for kids and bookworms. 360° FLEXIBLE COLLECTOR AND USB POWERED (ADAPTER NOT INCLUDED): With the flexible gooseneck, you can effortlessly adjust your clip and direct the light where you want it. The USB cable can simply be connected to an available USB port (laptop / desktop / power bank / USB adapter) to power the lamp.【Please Note: Only use with the 5V/2A adapter, otherwise the control button and reading light will be damaged. 】 AUTO-OFF (1 MINUTES) AND MEMORY FUNCTION: If you press the on/off button for 2 seconds, the blue light will flash and the clamp lamp will automatically turn off after 1 minute. The desk lamp can automatically remember the brightness setting when it was last used. When switched on again, the last brightness set and the last mode set are retained. ECO-FRIENDLY AND SERVICE: As an eco-friendly LED lamp, it consumes 80% less electricity than conventional incandescent lamps, so you can reduce your carbon footprint and your electricity bill at the same time. All of our products have passed the strict quality test. If your product arrived defective or damaged, please contact our seller support. We will respond as soon as possible.