1. Direct USB Type Bar MP3 Player; 2. Built-in rechargeable lithium polymer battery; 3. Backlight ... : 256M,512MB, 1GB, 2GB,4GB,8GB(Optional);2. Audio format: MP3,WMA,ASF;3. EQ Mode: Normal, Rock, Pop, Classical, Soft , Jazz ... , Best Price Will Provide to You! Direct USB Type Bar MP3 Player (EM646)