A 75% keyboard means it has no 10-key and they keys are smashed together. I love the 75% form factor. I have a lot of these Artek keyboards for sale after I switched to mechanical keyboards all in very good condition. They are some of the best wireless keyboards and they are very quiet. Because they are low-profile they don't require a wrist rest.
I have four RF versions, which were my primary keyboard for a long time. I have two without mice for $10 and two with mice for $15 each. The red mouse requires one extra USB dongle, the black mouse shares a dongle with the USB keyboard.