The keyboard is a compact K580 with a number pad. The mouse is a silent M331. Both connect via Unifying. Two receivers are included. Both the mouse and keyboard can be stored in the receiver compartment. The keyboard was used for about 3 months, and the mouse was used for about 3 days. Similar keyboard and mouse sets are available from Logitech, but this is a combined sale of individual products. Compact keyboards with number pads are not very common, so I think this is a valuable item.