IREX Technologies DR800S. Diagonal: 205.7 mm (8.1 "), Technology: 768 x 1024, Gray scale levels: 16 levels of grey. Document formats supported: pdf, epub, Image formats supported: JPG, BMP, PNG, GIF, TIFF. Internal storage capacity: 2 GB, Compatible memory cards: MicroSD. Interface type: MicroUSB 2.0. Built-in processor: Freescale i.MX31L