... on battery 3.Support TF card and USB flash disk Portable mini speakerDetail products descriptionMain Features1 computer speaker, ... -can be automatically charged by USB wireColors AvailableGreen, Blue, Red, OrangeConfigurations:1 Mini USB port2 On/off power switch3 ... portable, super slim and mini size, easy to carry4, Material: Pure ABS+ metal loudspeaker net Protable mini speaker with mulit- function ...