Covers frequencies from 750 kHz to 900 MHz, and gives you a choice of audio signal or LED to alert you to the presence of a bug device or other nearby RF source.
Sensitivity is adjustable.
Batteries and test RF source included. Sample floor plans are provided for clarification. Even includes questions at the end of each chapter, a glossary, and a reference to electrical code. Written well enough to be a study guide for electricians and easy enough to understand for the handyman. Although it does not directly address techniques for reducing EMF, this book is still highly recommended if you want to get involved with your home wiring.