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/ ... function,and automatic reading 3.very small and portable design*power on/off button,Volum control key* ... 52mm),antimagnetic,4 ohm6.Input voltage:DC 5V7.Speaker:3W x210.Use large capacity Lithium battery(1000mA), ...