Wireless spy cameras are cameras that do not record to an internal memory but rather transmit video signal so that it can be recorded and viewed elsewhere. A wireless spy cam may transmit video online so that it can be viewed remotely or it may transmit video to a receiver that records to an internal memory card or DVR or may allow live viewing through a monitor. Despite the name, a "wireless" camera means the camera does not have wires or does not have to be plugged in for power. This is not the case. In regards to video recording cameras, the word wireless does not refer to the cameras power source but rather the cameras method of video transmission.