An audio connector includes a receiving portion and a connector. Optionally, the first layer further comprises an complex comprising at least one of Ru or Ir. By using the overlapping area size and a similarity level indicating a matching degree between the input fingerprint information and the registered fingerprint information corresponding to the time when these images overlap each other the most, it is judged whether a re-input of an input fingerprint image should be requested. The alarm output is generated when the measured tilt angle relative to an established reference plane exceeds a programmed threshold angle for greater than a programmed amount of time.