Alarm systems are devices designed to detect and alert individuals of possible danger or security breaches. They can be grouped under a number of synonymous terms depending on their function and design. Some common synonyms for the term "alarm systems" include burglar alarms, security alarms, intrusion detection systems, fire alarms, smoke alarms, emergency alarms, and panic alarms. These systems may be wired or wireless, and may have sensors or cameras to detect motion, heat, or smoke. Their effectiveness is dependant on their design, installation and maintenance. Choosing the right synonym for an alarm system requires a clear understanding of its intended use, environment, and functionality.