A bug detector is a device that is able to discover and/or disable electronic spy equipment such as microphones, cameras, and GPS tracking equipment. Law enforcement institutions, military counter-intelligence agencies, bad guys, as well as regular people who are worried about being overheard typically make use of bug detectors. Bug detectors are normally small, portable, and have various display functions to alert the user to a “bug.”

How bug detectors work? A bug detector is basically a radio receiver that can pick up electromagnetic impulses that are broadcasted from an electronic device or specifically, a bug. Rather than changing these intercepted radio broadcasts into data or audio, the bug detector merely lights up and sounds an alarm each time it receives a strong frequency. By moving a bug detector around to nearby stuff, it is able to notify the user to concealed bugs.