Mixca&reg; Slim Mini Portable USB MP3 Music Player Digital LCD HD Screen Support 16GB TF Card (Black ) Small & Lightweight Design, 1.8" High Resolution LCD Screen. Memory Capacity: 8GB E-book function, Support txt file. Super Speedy USB Data Transfer -- USB 30-pin technology Built in rechargeable battery with up to 10 hours play time (charge with the USB adaptor)