SIIG 7-Port USB 3.0 Hub with 5V/4A Adapter Add additional 7 USB ports (3 USB 3.0 & 4 USB 2.0) to your system Solid, stylish aluminum finish with enlarged silicon pads to hold the hub steady Works with high-bandwidth SuperSpeed USB 3.0 devices, such as external hard disks, memory card readers, high resolution webcams, camcorders, digital video cameras, multi-channel audio and more Supports SuperSpeed USB 3.0 data transfer rate up to 5Gb/s and backward compatible with USB 2.0 & USB 1.1 devices Built-in over-current protection to protect both connected devices and the hub itself from unforeseen power surges 5V/4A power adapter included to provide sufficient power output to all ports Plug-n-Play and hot-swap allow you connect/disconnect devices without shutting down your computer