Periscope Periscope for the Kindle Keyboard, Kindle 2 and Nook Blue Ideal for reading at home or on the road, simply slip your Kindle into the custom designed holder, pull up the retractable, twin LED reading light, and begin reading in any low light environment in bed, on a bus, train, or airplane, as well as in a car or conference room. The Lighted Folio's built-in 5 x 8 notepad and pen holders makes it ideal for students and business users. The Periscope light is powered by three AA batteries (not included that last at least 40 hours. The Folio's left side cover can be folded over so the note pad is positioned behind the Kindle and locked in place with the magnetic cover snap to facilitate one-handed use. Amazon, Kindle and the Amazon Kindle logo are trademarks or registered trademarks of Amazon Technologies, Inc. or its affiliates. Works with Periscope AC Adaptor (model 83062 only - this is sold separately.