A hidden camera can be wired or wireless. https://www.youtube.com/watch?v=QZ5GGJiBWvM The former will be connected by cable to a viewing or recording device, such as a TV, VCR, digital video recorder (DVR), memory card or other data storage medium; whereas a wireless hidden camera can transmit a video signal to a receiver within a small radius, where the images may be viewed or recorded.
Hidden cameras may also have an audio capability. A hidden camera may be activated manually, by remote control or be connected to a motion detector.
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