A broken CD or DVD or other type of optical disc is a serious problem and one that will likely lead to loss of information stored on this media. A broken optical disc refers to a disc that has split into two or more pieces or perhaps a disc simply missing one piece.
A motion detector is a device that detects moving objects, particularly people. A motion detector is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.
Microwave Detectors: A type of proximity sensor that triggers when an object enters the sensors zone of protection. These sensors are very popular with open vehicles such as convertibles and Jeeps. Paging: Some alarms have a feature that can send a signal to a supplied pager when the car alarm is triggered.