| 摘要 |
PROBLEM TO BE SOLVED: To provide a mislaying prevention system capable of more surely preventing the mislaying of an article owned by a user.SOLUTION: A master unit (2) determines whether or not a distance between the master unit (2) and a slave unit (3) is equal to or more than a predetermined set distance (5 m). Also, the master unit (2) outputs an alarm sound when determining that the distance between the master unit (2) and the salve unit (3) is equal to or more than the set distance (5 m).SELECTED DRAWING: Figure 1 |
