Experience the joy of reading a variety of your favorite books?all stored digitally in one compact device. The slimmer, redesigned Reader Digital Book lets you carry a stack of books in one hand. The Reader Digital Book holds about 160 eBooks or hundreds more with optional removable memory cards. Its portable size makes it the perfect travel companion, allowing you to read a variety of books whenever and wherever you want. With thousands of eBook titles available at The eBook Store from Sony, you can choose to download new releases, classics and popular book titles as well as view other document formats such as Adobe PDF10, RTF, TXT, BBeB and Microsoft Word. Its long battery life lasts up to 7,500 continuous page turns, and the amazing paper-like screen technology is easy on the eyes. Screen Size - Approx. 6 Measured Diagonally; Resolution - Approx. 170 Pixels Per Inch; Gray Scale - 8-Level Grey Scale Up to 7,500 page turns on full charge Audio and picture playback Dual SD Card and Memory Stick(R) Pro Duo Expansion Slot Mountable USB Drive Charges via USB Unit Dimensions (Approx.) - 6.9 x 4.8 x 0.3 (175 x 122 x 8mm) / Weighs 9 ounces Includes Tan Soft Case, USB Cable, Quick Start(TM) Guide, CD-ROM Limited Warranty - Labor- 90 days from the date of purchase; Parts- 1 Year from the date of purchase