The Logitech Wireless Keyboard & Laser Mouse Combo K520 M310 is a reliable and tested product that offers a sleek black keyboard (3 with a grey mouse, and 1 with a blue mouse). All 4 wireless desktop sets include a unifying wireless USB receiver and have been tested, The desktop set makes it convenient for users to work or play without the hassle of cords. The Logitech brand ensures quality and durability, while the USB dongle provides easy connectivity for a seamless user experience. This bundle is a great choice for those looking for a dependable and efficient keyboard and mouse set for their computer or tablet

the unifying receiver can be easily programmed to control 4 more compatible devices (for a total of 6) utilizing just a single port.