A super-regenerative receiver is provided with a regenerative oscillator controlled by a frequency sweep circuit to control the bandwidth at which the receiver can receive a signal. In the preferred embodiment, the device consists of a case with enclosures and is of a portable nature so as to accompany an individual easily. The connection geometry is pressed onto the at least one end. Decision area control means controls a size of the decision area after the moving object is hit, based on a position of the moving object at a reference time based on at least one of a time at which the predetermined operation is performed and a time at which the operation subject character hits the moving object. Such red fluorescent material is able to improve quantum efficiency, compared with a red fluorescent material which does not contain calcium but contains strontium as the element A. 7 whichever is longer, where D is the diameter ) of the electrode and P is the power supplied to the electrode.