Type: USB Standards: USB 2.0/1.1 Ports: 4 x USB 2.0 Transfer Rate: 1.5/12/480Mbps Features: USB 2.0 and 1.1 compliant Compact desktop design ( 3.25"W x 2.75"D x .75"H ) Links up to 127 USB devices Does not require external power, software, or complicated set-up procedures Plug & Play and Hot Swap capability Windows and Mac compatible Parts: 1 year limited Labor: 1 year limited