Color: BlackCable Length: 30cmPorts: 4Upstream: USB-A (M)Downstream: 4 x USB-A (F)System Requirement: Windows XP/Vista/7/8/8.1/10/Linux/MacOSBest solution for USB port expansion.With USB2.0 specification.Backward compatible with USB1.1.Support data transfer up to 480Mbps.Plug and play, no need to install driver...