The invention is a ventilator whose servo-controller adjusts the degree of support by adjusting the profile of the pressure waveform as well as the pressure modulation amplitude. The network includes a plurality of nodes wherein at least two of the nodes are part of the private network. The shielding cover is movable in an upward and downward direction. The inner part of the gimbal structure may include a reflective surface, and the device may be used as a mirror. With this effect, the wheel assembly is given a strobing, flashing, or vibrating appearance.