![]() Protect your home or office with covert video technology. Utilize a smoke detector spy camera in addition to a prominent security camera, so if the latter gets blocked or busted, at least you'll have the secret back up. Smoke Detector Spy Cameras like the Bush Baby Dual Lens Smoke Detector Spy Cam even transmit digital video to your smartphone. These can detect signals anywhere from 1MHz to 10GHz or higher. Hidden camera finders that use RF detection pick up on the radio waves used by wireless cameras to transmit information.
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