How accurate is the dragon ruler?

The accuracy of the dragon ruler is 50%.

The dragon ruler has certain accuracy and practicability, which is very accurate for detecting known objects and extremely inaccurate for detecting unknown objects, so the accuracy of the dragon ruler is only 50%.

Dragon hunting ruler, also known as geogas ruler, dragon hunting stick, dragon hunting needle, etc. , a reaction to magnetic field, is widely used in geographical feng shui. It is a necessary wardrobe tool for Mr. Feng Shui. Dragon ruler has been used in the west for a long time, mainly to find mineral deposits and water sources.