small card speaker 1.portable speaker for computer,laptop,notebook,mobile,mp3,mp4 2.Compatible Micro SD/TF/U-disk mini ... card speaker for Computer Laptop notebook mobile mp3 mp4 Specification 1.Built-in Lithium-ion battery;Power ... ,SNR:≥80Ddb 7.Built-in FM Radio,radio module,surrounded antenna,automatic atation search,pristine sound quality,easy to use8.Material ...