Connect up to four USB 3.0, 2.0, or 1.1 devices to a single port on any computer. Attractive piano black, solid feeling, compact design with 4 green LEDs (one per USB port) for diagnosing connectivity. Compatibility Featuring the VIA VL811+ USB 3.0 hub chipset updated to firmware version 9095 for maximum compatibility with almost all USB 3.0 hosts. Supports Microsoft Windows 8.1 through XP, Mac OS X, and Linux kernels 3.0 and later. Apple SuperDrive not compatible. Older Mac Pros with USB 3.0 PCI Express add-on cards do not work with this or any USB 3.0 hub. Full forward and backward compatibility between USB 3.0, 2.0, and 1.1 hosts and devices. Not recommended for use with older Texas Instruments, Fresco Logic, Etron, or Wistron USB 3.0 host controllers. Requires no driver installation (although individual devices may require drivers). 2.4Ghz wireless devices such as wireless keyboard/mouse receivers, Bluetooth and WiFi adapters, may not work in close proximity to USB 3.0 devices or hubs. Connecting wireless devices to a USB 2.0 port is recommended for best results. Power and Charging Comes with premium 5V 4A 20W power supply for supporting several devices requiring USB 3.0"s more demanding 900mA per port power. All four ports provide new, advanced compatibility for devices which support the new BC 1.2 charging standard: charging and syncing ("Charging Downstream Port" or CDP mode) at up to 1.5A per port and dedicated charging with only the hub"s power adapter and no PC attached ("Dedicated Charging Port" or DCP mode) at up to 2.4A per port with dedicated Apple 1A, 2A, 2.4A, Samsung 2.4A, and Android charging signals.Charge and sync only works with BC 1.2 compatible devices such as the Apple iPhone 6, 6+, 5s, 5c, 5, iPad Retina, Air, Mini, (Apple 30 pin dock connector iPads will not charge), plus various Android and Windows devices are also supported. Not all devices support BC 1.2 charge and sync functionality.