Handy 4-Port USB 3.0 Power Hub High Speed USB Port Windows w/ ON/OFF Switch for Desktop Laptop PC 1. Make sure that on your computer has USB3.0 interface, if only with USB2.0 interface, it can not be achieved the USB3.0 speed (but better than USB2.0 HUB), the splitter box will be only backward compatible. 2.USB HUB is USB interface extender, connected to the computer only for increasing the USB interface. 3.Without external AC/DC power supply, this USB HUB is just available with U-disk, keyboard, mouse, USB fan, U Shield and other small power equipment; For high-power devices (such as printers, mobile hard disk, etc.), it is better to use an external power supply. Our products are equipped with an external power supply plug. So better choice! 4.Pls make sure that your computer itself can support external devices, if not, even with an external power supply, it is not guaranteed to help solve related problems. 5.Compatible Systems: Windows2000/XP/ME/Win7/VISTA or Linux2.4/Mac OS 10.2 and above; automatic identify & install, plug & play, support Hot swapping; Truly ultra high-speed USB3.0 interface, up to 5Gbps, backward compatible with USB2.0/1.1 standard.