There are many methods used to dowse ranging from dowsing rods, pendulums made out of crystal, metal or wood to just using a wedding band or needle suspended on a thread of cotton.
Traditionally, a forked branch, in the shape of a 'Y' from a tree or bush was used. Depending on the dowser, a specific tree was required to get the branch from, for example: witch hazel in the US and hazel twigs in Europe. Used outside, the dowser would walk around until the branch starts to twitch over a spot they are seeking, like a water source.
If dowsing using a form of pendulum, the dowser normally starts by asking it to indicate a 'yes' and a 'no'. The pendulum will then either sway back and forth or swing in a circle, clockwise or anti-clockwise. The dowser is then able to ask the pendulum questions that require a 'yes' or 'no' answer.
In the practice of radiesthesia, a pendulum is used for medical diagnosis.
Over the years, people have postured that dowsers are tapping into small changes in the magnetic field. Others believe that everyone already knows the answers to everything and that dowsers are actually unconsciously drawing their knowledge from the 'Akashic Records' - a non-physical plane of existence that holds all the answers.
Dowsing Enhancer is a program specifically designed to amplify the state required to dowse.