| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an alarm unit capable of performing an inspection work according to a purpose and excellent in waterproof performance.SOLUTION: An alarm unit comprises: a light receiving element for generating voltage when receiving light; a control part 4 for controlling an action; and operation means 11. The control part 4 performs a first inspection operation accompanying an alarm action when operating the operation means 11, and performs a second inspection operation different from the first inspection operation when the light receiving element receives the light.</p> |
