Personal alarms are small, portable devices designed to emit a loud sound when activated. They are often used for personal safety, helping to deter potential attackers or alert others in case of an emergency. Many personal alarms can be easily attached to keychains or bags, making them convenient to carry. These devices typically work by pulling a pin or pressing a button, which triggers the alarm. Some personal alarms also feature additional functions, such as built-in flashlights or emergency lights. They are popular among individuals who want an extra layer of security while walking alone or in unfamiliar areas.