A mask fitting system for selecting a mask system for a patient includes at least one terminal which receives data unique to a patient. The present invention allows session states to be maintained by sites that run on multiple, load-balanced servers. Provides intelligent selection of multiple videos from multiple cameras covering an event at a given time, for example selecting one with least shake. Therefore, detailed expression of water is possible when water exists in a scene, and various scenes with water can be depicted more realistically, which is a very important component of special effects. Since the heat conductive silicon layer is non-conductive, an electric shock does not occur between the electronic component and the metal shield case. According to the present invention, there is no need to install protection devices at respective IO ports on a printed circuit board to prevent the IC devices from damage by surge pulses.