... port usb 1.1 hub, 2 stereo speaker 1,USB1.1 compatible, support data tansfer rate of 1.5/12 Mbps2,4 usb port with individual port over ... -current protection.3,Plug-and ... play, no drivers required.4,support up to 127Hi-speed devices.5,comes with 2 stereo speaker with 3.5mm ...