Rosewill USB Hub with 4 Port USB 2.0 USB Data Hub Model RHB-220 Backward Compatible with USB 1.1 For bus -powered mode, the USB provide 500mA for all downstream & hub Plug the A-type connector into the PC host port Connect USB devices to the Hub downstream 1-4 Operating System Supported: Win 98SE /Me / 2000 / XP / Vista / 7, Linux, MAC OS 8.6 or above/OS x The 12Mbps (full speed), 1.5Mbps (low-speed) and 480Mbps for high-speed device The Rosewill RHB-220 features 4 USB 2.0 downstream ports for easy access to a variety of USB devices such as your storage device, scanner, printer, external optical drive, and digital camera The USB 2.0 interface enables high data transfer speeds of up to 480Mbps so you save time while copying or moving data This device is also backwards compatible with USB Revision 1.1 products