A bugging device is a small electronic tool used to secretly listen to conversations or gather information without the knowledge of the people involved. These devices can be hidden in various objects, such as clocks, smoke detectors, or even in clothing. They transmit audio signals to a receiver, allowing the user to monitor discussions from a distance. Bugging devices are often associated with surveillance and espionage, and they can be used by law enforcement, private investigators, or even individuals for personal reasons. The legality of using such devices varies by location and context, often requiring consent from at least one party involved in the conversation.