• EASY TO ATTACH: Built with an easy-to-attach clip that fastens to books and e-book devices. • FLEXIBLE NECK DESIGN: Designed with a flexible neck that can fully illuminate the screen. It can fit Kindle devices as well. • REDUCED GLARE: LED lighting is incredibly efficient, and it also reduces the glare on pages and e-book devices. This makes reading much easier and puts less strain on your eyes. • COST-EFFECTIVE MAINTENANCE: Includes (2) CR2032 coin cell batteries. Replacement batteries can be purchased on Amazon in bulk for approximately 0.25 per unit. • PORTABLE & LIGHTWEIGHT: Weighs only 2.4 ounces, with dimensions of 8.5 x 1.5 x 4 inches.