The Unifying ready feature on the PC mouse indicates the mouse is compatible with Logitech's Unifying technology. This technology allows you to connect multiple devices, such as a keyboard and mouse, to a single Unifying USB receiver. For users, this means fewer busy USB ports and easier management of wireless devices. If a mouse is designated as "Unifying ready", it can easily be added to an existing Unifying ecosystem without the need for an additional USB receiver.