TERABYTE 4 Port USB3.0/2.0 Hub With Independent Switches 4-Port-Hub USB Hub  (White)

4 usb ports standard a type upto 100ma current per port. 1usb mini b type female input connector. It provides full over current protection. mac , linux , windows virtually all os. usb 2.0 and acpi compatible With on/off switch. Power saving with individual switch. Has an elegant design. 5v/2a or 5v/1a converter adapter is required to to run multiple heavy/high power devices. However, devices like printer, keyboard, mouse, lower powered hard disk etc can run without adapter. Note - for best performance, use 5v adapter.to be purchased separately