Various devices are provided for conveniently storing, transporting and recharging wireless headsets and associated devices. The light source may use a specific range of visible light and also emit heat sufficient to raise the temperature of the teeth a desired amount at a depth up to about 2 mm in the range of about from 1-5\xb0 Celsius over a predetermined period of time. On the basis of the synchronizing information, the readout of two blocks of waveform data is controlled using the synchronizing information. One or more of the filter media sections traverses one or more of the shoulders or other radially-inwardly extending flow directors such that the flow directors evenly direct the flow of fluid through the assembly. The result keep 7t as 7s is provided to the logic control circuit coupled to the gate of the power switch after being driven by a driver circuit.