Optical and RF detection answer different questions

Privacy products are often grouped under one broad label even when they observe very different things. Optical inspection is concerned with visible features or reflections. RF detection is concerned with radio energy. A comparison is clearer when those observations are named directly rather than compressed into a promise to find everything.

An optical observation depends on what can be seen. The environment, the angle of view and the visibility of a surface can affect what the observer notices. A reflection is not automatically a camera lens; many ordinary objects also reflect light. The finding needs context and careful confirmation.

An RF indication depends on a signal reaching the receiver within its design limits. A non-transmitting recorder does not provide the same evidence as an active wireless transmitter. At the same time, ordinary wireless equipment may generate an indication. RF activity therefore cannot, by itself, establish that a recording device is present.

These differences shape a useful product review. Ask whether the product is actually described as optical, RF or both, and which parts of that description have been tested. Do not assume that features from one model apply to another with a similar name. The two methods have different blind spots, and combining labels does not remove those limits. For a serious concern, a documented professional assessment is more informative than a sweeping claim on a product page. This guide compares the evidence categories; it does not certify a product or provide a room-clearance procedure.