Hi-Speed 7 Port USB 2.0 Hub +Power AC Adapter for PC Support Universal serial Bus (USB) 2.0 and USB 1.1. One upstream port (USB-A male) and 7 downstream port (USB-A female) for 7 devices. Daisy-chain connection of up to 127 devices. Supports both bus-and self-powered (automatic switching power adapter included). Package lncludes: USB 2.0 Connection cable, Switching power adapter, USB hub, and Installation guide.