Different Color Temperatures: The Reading Light Clip On is designed with different color temperatures which contain cold light white light and warm light.Stepless Brightness Adjustment: There is stepless rightness for the Book Reading Light. Long press the power switch to change the brightness when any light color is on.No Extra USB Cable Needed: No extra USB cable is needed and the tail is directly connected to any USB port for charging. It can be used for 2-3 hours after being fully charged.Wide Applications: The Book Reading Light has wide applications which can be used for various e-readers and paper books. It can be clamped on a book tablet computer car sun visor or any other 0.52cm thick .Awesome Service: Your satisfaction is very important to us. Please feel free to contact us if there are any questions or issues. We will provide the perfect solution and all problems will be resolved within 24 hours.Description:The Reading Light is flexible from cold light, white light, and warm light. Meet your different needs while protecting your eyes. It can be clamped on a book, tablet computer, car sun visor, or any other 0.5~2cm thick .Instructions for use:1. With the function of turning on the brightness of the light, the default is the brightness used last time;2. Long press the power switch for 3 seconds to turn on the light, the default is 3000K warm yellow light when the light is turned on, and then short press the power switch to cycle the light color: 5500K white light-4500K warm white-turn off the light;3. When any lamp color is bright, long-press the power switch to adjust the brightness, from the current brightness to 100% brightness, release the power switch, and then long-press the power switch, the brightness of the light will be adjusted from 100% to 15%;4. The product is suitable for various e-book supplementary lighting and reading paper books.Specification:The light can switch three-stage color temperature, and the brightness is infinitely dimmable;Maximum brightness: 50 lumens;Three-stage adjustable temperature: 3000K-5500K-4500K;Power supply: 250MAH ternary polymer lithium battery;Maximum brightness duration: about 3 hoursCharging time: about 40 minutes;Product size: 18.3*2.5*0.9cmProduct net weight: 35gWhite box size: 18.8*2.9*2.2CMPacking List:Book light*1Clip *2