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 light color is on.No Extra USB Cable Needed No extra USB cable is needed and the tail is directly connected to 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 other 0.52cm thick .Awesome Your satisfaction is very important to us. Please feel free to if there are questions or issues. We will provide the solution and all problems will be resolved within 24 hours.DescriptionThe 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 other 0.52cm thick .Instructions for use1. With the function of turning on the brightness of the light, the default is the brightness used last time2. 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 light3. When 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 154. The product is suitable for various e-book supplementary lighting and reading paper books.SpecificationThe light can switch three-stage color temperature, and the brightness is infinitely dimmableMaximum brightness 50 lumensThree-stage adjustable temperature 3000K-5500K-4500KPower supply 250MAH ternary polymer lithium batteryMaximum brightness duration about 3 hoursCharging time about 40 minutesProduct size 18.32.50.9cmProduct net weight 35gWhite box size 18.82.92.2CMPacking ListBook light1Clip 2