360 Adustable & Blue Light Blocking - The reading light supports 360 degree arbitrary adjustment, which can evenly illuminate the book when reading. Adjustable book light blue light blocking, reading in bed or in the dark won't hurt eyes, especially for children. 7 LED & 3 Colors - 7 LED book reading lights have 3 color modes to meet the reading needs of most readers. 3000K warm color contains 3 LED, 6000K white color contains 4 LED, 3000K+6000K combination color contains 14 LED. Ultralight & Portable Design - The clip on book lamp is very lightweight and easy to carry when folded to the size of a girl's palm. Our book light clips onto books, Kindle, ipad, laptop and comes with a non-slip pad to protect items from scratches or damage. Strong Battery & Service Life - Rechargeable book lights, using rechargeable batteries. Battery capacity: 600mAh. After a full charge, you can enjoy about 10 hours of wireless reading. Battery operated book lights can be widely used for reading, embroidery, painting and so on. Leds last more than 50,000 hours without replacement.