I don't think Radio Shack carries "sharing" hubs. They are somewhat hard to find -- hardly ever found in retail stores. What sets a SHARING hub apart from ORDINARY hubs is its ability to toggle access to USB ports back-and-forth between 2 hosts (eg. 2 PCs, or PC and Keyboard) with a simple push of a button. The one I purchased instantly transfers access to ALL FOUR PORTS, and works flawlessly.