The VU1 has 2 kit options.
1. The Starter Kit – This includes everything you need to get started, a single ‘HUB’ to connect VU1 to your PC and 3 x ‘DIALS’ that make a total of 4 displays.
2. The Expansion Kit – This is designed for users that already have a ‘HUB’ but wish to increase the total number of DIALs by 4