The Alisse keypads come in several configuration options. Single column, dual column, and triple column, with each column having a maximum of 3 rows. So the maximum amount of buttons you can achieve is 9 buttons on one keypad. But the really great thing about these keypads, for installers, is the fact that whichever option you go for, they all fit a single gang metal backbox and they all have the same electronics that fits within that backbox. So if a client has a single button keypad, then a year down the road decides that actually, they want the 9 button option, you can just change the faceplate, everything else remains. No chiseling out walls, no expensive electronics, just a new faceplate.