An impressive array of electronic equipment is available for use in invading your privacy.
Most toy stores carry inexpensive walkie-talkies that are ideal for a quick and dirty room bug.
The eavesdropper simply installs the battery, tapes down the transmit button and hides the walkie-talkie in the target room. Not only can mom use it to keep an ear on her little one, but since it has a transmit range of about three blocks, it makes a nifty bug also. One of the most common telephone bugging attacks is the hookswitch bypass. About 45 cents. We have barely scratched the surface of what is readily available for bugging, wiretapping and video surveillance.