Product Description Luminous Flux 580lm (Max) Input Voltage (V): 100-240V 50/60 HZ Output Voltage (V): 5V-1A Color Temperature: 3000k/4000k/6500k Power: 7WCRI: Ra>80 Color: Black Material: Metal Packaging Contents: 1*LED Clip-on Desk Lamp 1. Flexible and infinitely adjustable gooseneck design The neck and head can be adjusted 180 degrees up and down and rotated 360 degrees for easy positioning and setting the perfect lighting direction as needed. 2.Dimmable10 Brightness Levels - Pressing the brightness button allows you to easily adjust the brightness level between 10% and 100% for perfect lighting. Easily find the perfect lighting for your project. 3 Color Temperatures Available - The reading light has 3000K-4000K-6500K (3 color temperatures) to meet your different lighting needs. 3. USB power supply and memory function This table lamp comes with an adapter. Plug the USB cable into a power adapter, computer or other USB device to power the clip light. Brightness memory will remember your current brightness when the light is turned off. (Note: If you cut power instead of turning off the switch, it will release all settings.) 4. Desk lamp clip is easy to install The lamp clip with strong metal clip can be clipped on any flat surface with thickness less than 4-6cm (maximum). 5. Professional eye protection Using diffuse reflective translucent material, close to daylight lighting, emitting soft light without ghosting, glare and flicker. The led work light is suitable for bedside, reading, music stand, painting, working, studying, etc.