... effect, 8.fast delivery,good service9.with led lights function FUNCTIONS:•sport bike mini speaker.•Built-in rechargeable Li-ion battery ... usb rechargeable sport bike mini speaker•With usb/tf slot pc mini speaker.•Accompanying usb rechargeable sport bike mini speaker for PC,MP3 ... for your convenience, connecting to your MP3,MP4, CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, Hi-fi ...