Spark Revolution Dual LED Flexible Neck Book Night Light for Use with Kindle, eReaders, Soft Cover and Hard Cover Books | Warranty Included &hellip; Powered by three AAA batteries (not included) that can be removed and replaced at any time High output, low-drain LEDs that have two brightness levels; use one LED or both for more coverage VERSATILE DESIGN - Wide base for freestanding use when not clipped to a book; great as a desk lamp The ultra-bright LED delivers a crisp and clear light that evenly covers your books pages LIFETIME WARRANTY-Make this the last light you ever buy. We'll replace it if it breaks