This item is under development, and it's expected to ship in July. If you pre-order it, we'll ship it separately from non-module items, and at our own expense. Please subscribe to our monthly newsletter, so we can keep you updated.
The key cluster module attaches to the left keyboard half, and it features three regular keys, two buttons and a mini trackball which can also be pressed – acting as an extra button. Following is a demonstration of our latest key cluster and trackball module prototypes.