The book light clips to any size book, magazine, e-reader, tablet, laptop and so much more. It can also be used for convenient table top illumination. The FlexNeck Booklight runs on 3 AAA Batteries (not included). Carson backs their products with a Limited Lifetime Warranty. Booklight, can flex and turn to shine super-bright LED light right where you need it most. DIM: 1. 5" x 1. 7" x 6". 51 lumens. Requires 3 AAA batteries. Ultrabright LED reading light. Fully adjustable lamp head. Clips to books, magazines, tablets & e-readers. Ideal for needlework & crafts. Compact & portable design. Batteries Not Included. The FlexNeck Fully-Adjustable Booklight from Carson has a lamp head that can flex and turn to shine super-bright LED light right where you need it most.