Kobo Touch. Diagonal: 152.4 mm (6 "), Technology: E Ink Pearl, Gray scale levels: 16 levels of grey. Document formats supported: ePub, HTML, PDF, RTF, TXT, PDF, RTF, Image formats supported: BMP, JPG, PNG, TIF. Internal storage capacity: 2 GB, Compatible memory cards: microSD, Maximum memory card size: 32 GB. Interface type: USB 2.0, Wireless LAN type: 802.11b, 802.11g, 802.11n. Processor clock speed: 800 MHz, Built-in processor: Freescale MX508