how the pendulum works?

[Lake]

Originally Posted by Dell Winders

The Dowsing Pendulum is usually used as a visible communication extension of your own mind. A meta-physics, psychic tool, usually used for Map, photo, and Information Dowsing.

It certainly requires lots of work to practice mind, focus, mind-body-connection etc to get accurate results..
Binaural sounds and meditation might be useful.
http://www.bwgen.com/