Warning devices are tools designed to alert individuals to potential dangers or hazards. They can take many forms, such as alarms, lights, or signs, and are commonly used in various settings, including homes, workplaces, and public areas. These devices help prevent accidents by notifying people of risks, such as fire, gas leaks, or unsafe conditions. Many warning devices are equipped with sensors that detect specific threats. For example, a smoke detector senses smoke and triggers an alarm, while a traffic light signals when vehicles should stop or go. By providing timely alerts, warning devices play a crucial role in enhancing safety and reducing risks.