Home Security Systems
Home Security System Repair Questions? Ask a Technician.
Hidden pinhole cameras could be inserted in almost any object and made to look innocuous, e.g. a light switch or a door latch, etc.
If the cameras are transmitting wirelessly, then there are some detectors available to find suspect wireless signals, or you could hire a 'bug detector' to sweep the premises.
A camera could be installed inside virtually any object.
Using a good frequency detector should guide you to within a few inches of any source.