They put out a pretty strong signal, so it is not uncommon to tune in a household that is up to one block away. What parents fail to realize, is that these devices are miniature radio stations. They are intentionally designed to pickup everything from the slightest whisper to a pin drop, and easily broadcast a private conversation to anyone with a scanner. The newest generation monitors operate in the 900 Mhz range, and Fisher-Price even sells the Direct Link Privacy Monitor that scrambles conversations. Specifications Faxback Doc.
Specifications are subject to change without notice.