One of the innovative items at the recent Consumer Electronics Show in Las Vegas was the TeleSpy, a traditional-looking and normally operating telephone. What makes the TeleSpy unique is its ability to act as a no-cost security monitoring system.
Installation is quick and simple. If you can plug a phone into a standard phone jack, then you can install the TeleSpy. There are no complicated adjustments to activate. Simply position and aim the phone in the direction of the area you want monitored. Plug the standard modular plug into your phone jack and plug the supplied AC power adapter into the jack on the side of the phone. (more) (ad) (instructional video) (Wolfman)
Why do I mention it?
So you will know what you are up against.