IREX Technologies the iLiad Book Edition. Diagonal: 205.7 mm (8.1 "), Gray scale levels: 16 levels of grey, Display resolution: 768 x 1024 pixels. Document formats supported: pdf. Internal storage capacity: 0.0625, 0.125 GB, Compatible memory cards: MMC, CF. Interface type: USB. Processor clock speed: 400 MHz, Built-in processor: Intel XScale