I'm a bit shocked at this, but in the first product image on this combo, it clearly displays the unifying receiver, the main reason I purchased two of these sets instead of the cheaper ones. Turns out, thats false advertising. I should have read the description below, so just a warning to ignore the image. I wonder if it was done like that in order to entice people to purchase it. Disgusting for logitech to sell any wireless mice and keyboards without the unifying receiver, basically their only selling point as their products I've always found cheap feeling and bad for over 20 years. Last time I'll buy their crap, for me or my work.