inkBOOK Obsidian - 6" E Ink Carta touch & Flat Glass Solution screen ebook reader, Built-in Light, Android Apps Store, Wi-Fi, 8 GB, SD Memory Card The E Ink Carta Flat Glass Solution screen display provides the best reading experience, great text quality, and rapid page turns. No eye strain on long reading sessions Superb Eye-friendly Built-in Light. Set the brightness level you like, or turn it off A single battery charge lasts weeks Physical page-turn buttons Install and run Android readings apps