Lightweight and portable is suitable for travel or camping etc outdoor activities. | Bright, even LED light illuminates the screen without any "hot spots". | Flexible neck adjusts to eliminate reflection or glare. | Clip designed for paper book and e-book reader.Clip width and depth insure secure, stable connection to the e-book reader without interfering with the screen. | Size: 17.3cm x 3cm x 2.6cm/6.81" x 1.18" x 1.02" ; (Powered by: 2 x CR2032 Button Batteries(Included))