A fire alarm is a device that detects the presence of smoke or fire and sounds an alarm to warn people in the area. Fire alarms are an important safety device that can help to save lives in the event of a fire.
There are many different types of fire alarms, but they all work on the same basic principle. When smoke or heat is detected, the alarm will sound an alarm to alert people in the area. Some fire alarms are also equipped with a strobe light to provide a visual warning.