Overview: Aluminum alloy surface with high tensile strength Plug & Play 4 port high speed USB (Universal Serial Bus) HUBSupport 4 bus-powered downstream ports Provides up to 500m A current to each port which is sufficient for diverse devices.USB 2.0 standard Specification: Weight Approx:38.7g Size Approx:5.8 x 1.1 x 1.1