... quality speaker support FM, SD,TFcard, SD and TF TWO card slots with USB SOUND CARD/ 900mah battery crystal ball *Function1. Support USB disk ... ,SD card,TFcard(two card jack),2. Built-in USB sound card3. Support ... in 900mah li-battery 6. Frequency Range:80-2000HZ crystal ball protable speaker with FM function,USB mini speaker/crystal ball