The Customizable Series offers frames in 6 different sizes to meet your needs and requirements. Each of these sizes can come in a combination ranging from all empty module slots so that you can choose whatever modules suit you, up to full glass touch switch modules. Therefore it allows you to choose the exact combination of smart touch switches and empty module slots to fit your need. For example the Glass 2 frame can come in either one empty modules slot and one touch switch module or full touch switch module or full empty module slots. For the touch switch modules you have the option of having one, two, three, or four switch buttons per touch switch module, allowing for full customization based on your needs.