Features: Add 4 USB 2.0 hi-speed ports Fully complies with USB 2.0 specification Supports up to 127 hi-speed devices Backwardly compatible with USB 1.1 Supports data transfer rate at 1.5/12/480Mbps Individual port over-current protection Easily portable Color: silvery white Provide up to 500mA per port which is sufficient for diverse devices Power from USB port Power adapter included Plug-and-play 1 hi-speed mini port used to connect with PC USB port with USB cable Requirements: One available USB port Microsoft Windows 98SE/2000/ME/XP/VIista Specifications: Interface: USB 2.0 and compatible with USB 1.1 Data transfer rate: 1.5Mbps/12Mbps/up to 480Mbps 4 separate port USB 2.0 expansion Bus-power limit current protection: 500mA