[Yellow Light and Daylight] - This children's book light has 2 light modes to choose from, 4000K white light and 1550K yellow light, it can block 99.94% blue light, good for eye protection. Change the modes by pressing the touch button on the lamp head. n [Brightness Dimmable] -- The reading light is 25 Lumen, the brightness can be adjusted from to 50%. You can choose the perfect brightness to keep your eyes comfortable, enjoy reading in bed without disturbing your roommate. n [USB Rechargeable] - The LED reading light can be charged with any preferred universal USB interface, simple and convenient. Fully charged takes 2-3 hours and provides 7 hours of lighting time. n [Flexible Lamp Head] -- The LED head of the book lamp can be rotated 90° counterclockwise, 180° clockwise, 45° downward, to perfectly meet your lighting direction needs. n [Super Light and Portable] - Small and lightweight, easy to attach to the book, can be folded completely flat and slim, portable for reading on the plane, train or in the car when traveling. n p>