... NAND flash Expandable Memory: SD Cards, U-Disks, USB-HDDs LCD Screen: 7.1” inch TFT High ... for external drives) USB 1.1 x 2 (for external keyboard and mouse) SD/MMC Card Slot Microphone Jack ... PowerPoint, PDF Viewer, Image Viewer, MS WordPad, E-book reader, Calculator, etc. Audio options: MP3/WAV/WMA/AAC, AAC ... to 5 hours Battery: 7.4V 1800mAh built-in Smart Lithium battery Adapter: 110-240V AC, 9V DC, ...