A shutter device and an image capturing apparatus including the shutter device are provided. The results of the identification can be used to control access and may be output to a security monitor. The sealing member has a sealing surface at a distal end. The one procedure is associated with one of the respective types of circuitry that is actually available to be used by the first processor. The bottom seat is fixed on a bottom side of the dustproof cover body for preventing the rotating element from being moved longitudinally, and the bottom seat has a third through hole corresponding to the first and second through holes. In particular, the number of transmission processes is determined based on the position of time intervals available for the transmission and may be selected in order to control the round trip time of the retransmission protocol.