Satechi ST-UHA USB Hub adds four additional USB ports to your Mac (or PC), allowing you to connect USB devices such as digital cameras, phones, external hard drives, flash drives, and printers. It’s sleek aluminum design with shielded white cable is the perfect complement to your Apple computer and products. It does not require any software or complicated installation process. With a slim, strip-shape design, it saves you precious desktop space. It’s extremely portable and easy to move between systems or take on the road. For a stable connection, the devices connected to the 4 Port Aluminum hub must not exceed a combined current of 5 volts 500mAh. External hard-drives should be connected to an external power source. The Satechi 4 Port Aluminum hub will not charge an iPad (it will only sync).