USB Hub D-Link DUB-H4:Compact, USB hub in an external four-port design with USB 2.0 support. The maximum communication speed is up to 480MB/s. It is suitable for devices such as mice, keyboards, joysticks, memory card readers, printers and other USB devices. Built-in power adapter helps with more power-intensive devices such as scanners, external hard drives, and more. An advantage is the indication diode for easy operation control.Parameters and Specifications:Standards:USB 2.0, USB 1.1, USB 1.0OHCI (Open Host Controller Interface)EHCI (Enhanced Host Controller Interface)Ports:1 x miniUSB (upstream)4 x USB Type A (downstream)Supported OS:Mac OS XMicrosoft Windows XP, ME, 2000, 98Other Features:Transmission speed up to 480MbpsUp to 127 devices can be connectedPlug-n-PlayExternal power adapter includedLoads up to 500mA per portDimensions:99.6x59.5x25.7mm