How to detect whether there is a monitoring device in the room

You can first turn off all the lights in the room, turn on the camera on your mobile phone, and then check various hidden places to see if there is any light. Generally, if there are small red dots in the room or in the furnishings, it means there is light. Monitoring equipment. It depends on whether the eavesdropping device is limited or wireless. Limited ones are generally more difficult to detect. Wireless ones have special equipment. You can just search online for example, wireless detection and wireless detection.