Input: USB-A Port x 2 for computer(One computer has access at a time) Output: USB-A Port x 4 for device Support speed up to 480Mbps Micro usb power port 5V Includes two 1.5m USB cables Note:Length from computer to HUB can not surpass 2m Support Windows XP/7/8/10/11/Vista,MAC OS 8.6 and above; Plug and Play, no driver required; Dimensions: 105mm x 53mm x 16mm.