A red smoke grenade is a type of signaling device that produces a dense cloud of red smoke when ignited. It is commonly used in military operations, training exercises, and outdoor activities to mark locations, signal for help, or provide cover. The bright red color makes it easily visible from a distance, which is useful for communication in various environments. These grenades are typically cylindrical and can be activated by pulling a pin or using a fuse. They are designed to burn for a specific duration, usually ranging from 30 seconds to a few minutes, depending on the model.