Electronic audio and video devices are never used by terrorists for surveillance purposes.

There are a few different places one could go to shop for audio surveillance equipment. One of the best places to start is at a local police supply store.

The digital video recorder spy name is the best cheapest video and audio surveillance to use in a house to spy.

The most common type of surveillance system is a video sytem, either self-monitored or monitored remotely by a company. Other forms of surveillance systems include audio and internet monitoring.

Any kind of video or audio surveillance that is conducted within the home, or any other place where there's a reasonable expectation of privacy, requires a search warrant for surveillance, which is only valid for a certain amount of time.