Apparatus and methods for treating skin conditions that deliver high frequency energy to a patient’s tissue. In one embodiment, the comparator circuit comprises two voltage-to-time converter circuits, one for each input voltage to be compared, and an arbiter circuit for receiving the time-converted output of each converter. The system collects data from the computer or another computer at the location and transmits data to a computer at a remote location. The display module may be suspended via the magnetic repellent between the magnets disposed at the display module and the magnets disposed at two cases. The orientable coupling is configured to adjust the saw guide at a selectable anteriorposterior angle and a selected mediallateral angle.