Patent Design.and Original USB 2.0 hub with 4 ports Speed supported: 480Mbps, 12Mbps and 1.5 Mbps Hot swappable, connect and remove peripherals any time With USB power adapter to increase power Windows 98/ME/2000/XP and Mac 0S9.0 or above Pack Details Quantity:100PCS/CTN NW:7.5KG GW:8.5KG Carton size:39*33*42.5CM