Features: Add four USB 2.0 high speed ports Fully compliant with USB 2.0 specification Supports up to 127 high speed devices Backwardly compatible with USB 1.1 Supports data transfer rate at 1.5/12/480 Mbps Individual port over current protection 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 function One mini port used to connect with PC USB port with USB cable Requirements: One available USB port Windows 98SE/2000/ME/XP/Vista Specifications: Interface: USB 2.0, compatible with USB 1.1 Four separate port USB 2.0 expansion Bus power limit current protection: 500mA