PORTABLE MP3 PLAYER WITH 20GB HARD DISK Stores More than 5,000 Songs. Up to 12 Hours of Battery Life. Supports MP3, WMA Music files. Ultra-fast USB 2.0 Transfers (up to 40 times faster than USB 1.0). Built-In FM tuner. Built-In Voice Recorder. Simple and Easy Music Navigation. Real-Time MP3 Encoding (no PC required). 20GB of Internal Storage. Mobile Data Storage Function (Store or transfer files of any type) Big Backlit LCD. Rechargeable Lithium Polymer battery. Upgradeable firmware.