The USB2-222 is a 4 Port USB 2.0 Compliant Hub allows up to 4 USB 1.1 or 2.0 Devices to be connected to you computer. It supports the High Speed transmission rate of up to 480 Mbps and is fully backward compatible with USB revision 1.1 devices. The USB2-222 makes an excellent solution for those wanting to maximise the USB intake of their PC.Specification 4 USB 2.0 Ports up to 100mA per port or up to 500mA (with power adapter) Supports over current protection on each port. Provides 4 Type A Female and 1 Type B Female Connectors. Supports High-Speed (480 Mbps) Full-Speed (12 Mbps) and Low-Speed (1.5 Mbps) Compliant with USB specification Revision 2.0. Chains up to 127 USB devices Power LED to indicate Self-power or Bus Power. Supports Plug and Play Contents 4 Port USB 2.0 Hub 80cm USB cable type A to B PSU