This is the ADT Pulse In-Wall Dimmer Switch 45612WB that you would replace your light switch with if you want dimming ability. It's also useful if you don't have florescent light bulbs. This switch is pretty awesome because you can have lights dimmed to any level in a room from your light switch. You can also control it from your ADT Pulse portal.
It has been replaced with the newer version
ADT Pulse Dimmer 45712 and it does not come with the cover plate (which can be purchased at any hardware store if you do not have one). If you purchase this, you will just be shipped the new version the
45712.