An electronic communication system associated with a settlement house for settling an electronic transaction between a customer and a merchant. Additionally, the apparatus, the system and the method attach andor secure the device andor a detachable means of the device to the fixture. The three dimensions are interrelated. The displacement amount monitoring electrode structure monitors a displacement amount of a detection mass to be driven at a target amplitude based on a change amount of a capacitance between the fixed electrode and the movable electrode. Further, the invention is characterized by the fact that when the image data is recorded in a file section 16 finally as a JPEG file, the pixel data of each color of YCbCr is represented as data type of eight bits and the information amount per pixel is 24 bits for recording more color information without increasing the memory capacity.