Aluratek AEBK02FB. Diagonal: 127 mm (5 "), Technology: E Ink. Document formats supported: ePub, FB2, PDF, RTF, TXT, Audio formats supported: AAC, MP3, OGG, WAV, WMA, Image formats supported: BMP, GIF, JPG, PNG. Compatible memory cards: SD, Maximum memory card size: 32 GB. Interface type: USB 2.0, USB connector type: mini USB B, Headphone connectivity: 3.5 mm. Battery life (max): 336 h, Continuous reading time: 20 h, Battery technology: Lithium-Ion (Li-Ion)