The Base Kit (Barbone) includes everything you need EXCEPT switches and keycaps. The switches and Keycaps are offered with the Full Kit. Kit Addams is a cute numpad and the perfect accessory for laptops. It has inherited the minimalistic fort design style and all the features from Kit Adam, eg. hot-swappable, RGBs, QMK/VIAL, Gasket mount, etc, which are very beloved amount Adam owners. Although Kit Adam is a fantastic keyboard, it can be difficult to use for tasks that require a numpad - such as accounting or data entry. This is where Kit Addams comes in - it's a separate module that can be attached to the Kit Adam to provide a fully-functional numpad.