The arranged work change-over switch can alarm simultaneously by changing over the inductive alarm of human body, the induction of human body, and the air vibration.
所设置的工作转换开关可以切换人体感应报警、人体感应与空气振动同时报警。
2
The utility model relates to an earthquake alarm which is formed by the connection of a power circuit, a vibration sensor, an alarm delay control circuit and a sound alarm circuit.