An embodiment of the invention relates to a wireless attachment device, having an attachment section configured for attachment to a patient; an audio device configured to pick up pressure waves from the patient’s brain and output data represention of the pressure waves; and a wireless transmitter connected to the audio device and configured to transmit the data representating the pressure waves. The roll of sheet material is defined by a width and includes an outer-most layer. The chassis and the framework define a center of gravity that is centered at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that is centered at the leading wheel assembly in the standing condition of the framework. Following a failure that affects availability of the primary server, the client or gateway connects to the previously identified secondary server to access the same resource instance. The base station is coupled to a PSTN network or cellular network. The switch further includes a conductor located proximate to the supporting structure and the cantilever.