Round Shape Portable speaker, Multimedia speaker, portable speaker, Mobilephone MP3 speaker,computer speaker,laptop speaker Specifications:MP3 speaker: 1.card reading function,can read USB ... 2.USB plug,can play MP3 audio file MP3 speaker introduction:1.with MP3 & WMA double decoder2.Can ... diameter 52mm),antimagnetic,4 ohm6.Input voltage:DC 5V7.Speaker:3W x210.Use large capacity Lithium battery(1000mA), ...