| 摘要 |
The present invention includes a monitoring end device and a warning end device. When the monitoring end device is placed on a laptop computer or connected with the laptop computer, if the monitoring end device is displaced by vibration or a distance detection unit loses a wireless signal of a transmission or receiving unit, then a warning sound will be sent out through a loud speaker. At this time, the warning end device also produces vibration and a warning sound through a vibration unit and a loud speaker, thereby warning and informing a user of a safety condition of the laptop computer. |
