LOGITECH Wireless Wave Combo MK550. (It is in really good condition, comes with original box and manual.)

Unifying receiver, Advanced 2.4GHZ, Keyboard, Cushioned palm rest, Laser Mouse

Wave-shaped key frame
Your fingers vary in length. So with its gradual wave-shaped contour, this keyboard supports the actual, varied lengths of your fingers.

Cushioned, contoured palm rest
The palm rest helps position your hands comfortably on the keyboard—and offers a comfortable place to rest your palms when you’re not typing.

Hand-friendly laser mouse
Contoured sides and soft rubber grips keep your hand comfortable, supported, and in control. You’ll enjoy smooth, precise tracking on virtually any surface.*

Logitech® Unifying receiver
The tiny wireless receiver stays in your laptop—there’s no need to unplug it when you move around—and connects both the keyboard and mouse.

Advanced 2.4 GHz wireless connectivity
So you can work or play in more places—like your comfy couch—the long-range wireless connection virtually eliminates delays, dropouts, and interference.

Adjustable keyboard height
Three options for leg height allow you to adjust the keyboard to the height that feels most comfortable to you.