Ultra-Mini 4-Port USB Hub The Ultra-Mini USB 2.0 Hi-Speed 4-Port Hub enables you to connect USB peripherals to your PC quickly and easily without having to reboot your system. Complies with USB 2.0 standard. One Upstream port and 4 downstream ports. Support both iMac and PC computers. Easy to expand USB hub allows use up to 127 USB devices. Each Port has active LED indicator. Data Transfer Rate: Max 480 Mbps per second. Each port supports 500mA current up to 15 feet cable. Support both bus powers and self-powered device. Power Control / Overload detect on each indivdual USB port. Brand new, 1 year warranty!