Syba 3.5" Internal USB 2.0 Hub Mounts into 3.5" Slot or Use Externally Components (SD-U2HUB-4) USB 2.0 compliant Support 4 downstream ports Connects up to 127 USB devices All 4 downstream ports supporting high-speed ( 480 Mbps ), full-speed ( 12Mbps ) and Low-speed ( 1.5Mbps ) transaction LED indicator support for Power On and port enable Support two power modes of operation - USB Bus powered or Self powered All 4 downstream ports supporting high-speed ( 480 Mbps ), full-speed ( 12Mbps ) and Low-speed ( 1.5Mbps ) transaction Designed for PC requiring more USB ports easily accessible on the front panel, best for digital camera, portable drive enclosure and mini flash drive