Normally when you buy a hidden camera, there is a small board camera is built in an article every day as an air freshener or CO2 Detector, Alarm Clock. The spy camera can be wired which means it is connected to the DVR or VCR using a cable. The device can also be wireless, in this case, the device emits a signal to a receiver that is connected to the DVR or VCR. There are many hidden cameras that come in all types of devices. But …