Optional Color Temperatures: Our reading book can meet your different needs while protecting your eyes. It is designed with cool 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 a light color is on. No extra USB cable required: No extra USB cable is needed, and the tail is directly connected to any USB port to the loading. It can be used for 2-3 hours after being fully charged.□Heavy Duty: With heavy usage of the reading light it can be used for various e-readers and paper books. It can be fixed on a book, a tablet, a car sun visor or any other from 05 to 2 cm thick.
