... ). USB 2.0; 3). Built-in speaker: 2*3W; 4). Support SD, MMC card; ... 5). Lithium battery, USB, adaptor. 1. Portable speaker;2. Metal case;3. Memory card slot: SD, MMC ... Audio support: MP3, WMA, WAV;6. Built-in speaker: 2*3W;7. Line-in: Connect to Mobile, PC ... battery, USB or DC adaptor(Optional);10. Accessories: USB cable, manual, line-in cable, adaptor, gift box. Metal case portable speaker