Prestigio PER3464B. Diagonal: 152.4 mm (6 "), Technology: E Ink, Gray scale levels: 16 levels of grey. Document formats supported: CHM, FB2, HTML, PDF, TXT, Audio formats supported: AAC, FLAC, OGG, WAV, WMA, Image formats supported: BMP, GIF, JPG, PNG. Internal storage capacity: 4 GB, Compatible memory cards: microSDHC, Maximum memory card size: 32 GB. Interface type: USB 2.0, Headphone connectivity: 3.5 mm. Continuous audio playback time: 5 h, Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 1200 mAh