The VU1 is housed in a 55mm cube, machined from extruded aluminium and finished with our signature sandblasted & anodised surface giving it a premium look and solid feel. There are two types of device, a HUB and a DIAL and whilst they share the same design and construction, the HUB features an additional USB port for connectivity to the device that will be supplying power and data, e. g. your PC or Raspberry Pi.