content: I bought this set for my husband. We've had no problems with the keyboard, however, the mouse is the worst mouse I've ever used. I don't even know how to describe it. It's sluggish and nearly impossible to use no matter what settings we used. I can find absolutely no redeeming qualities for this mouse other than it did work, just not acceptably. I finally just ordered him a new mouse. I went with the same Logitech Nano that I have and love!