A:AnswerThe additional buttons are built into the spin wheel, using your fingers you move the center spin wheel to the right or left side.to operate the preselected function that you select.
A:AnswerNo, this mouse is connected with Logitech's "unified" wireless system. I have had BT mice and keyboards. My opinion is that this system is far better.
A:Answeras long as your keyboard has a unifying dongle. (with the orange star printed on it) You can use the Logitech Unifying software to pair it to the same dongle.