... mini speaker 1.Factory direct 2.Built-in rechargeable li-on battery 3.Support TF card and USB flash disk Portable mini ... speakerDetail products descriptionMain Features1 computer speaker,also for mobile phone, mp3,mp4 ... travel ,portable, super slim and mini size, easy to carry4, Material: Pure ABS+ metal loudspeaker net Protable mini speaker with mulit- function