Kobo Touch. Diagonal: 152.4 mm (6 "), Technology: E Ink, Gray scale levels: 16 levels of grey. Document formats supported: CBZ, ePub, MOBI, PDF, Image formats supported: BMP, GIF, JPG, PNG, TIF. Internal storage capacity: 2 GB, Compatible memory cards: SD, Maximum memory card size: 32 GB. Interface type: USB 2.0, Wireless LAN type: 802.11b, 802.11g, 802.11n. Built-in processor: Freescale 508