Fengshui luban ruler.
Luban ruler is a widely popular construction tools in ancient China. Used mainly to measure the size of residential doors and furniture. In ancient times, people think that the size determined by Luban ruler will shine auspicious gateway and will bring good fortune to the family.
All objects resonate to a particular vibration depending on their dimensions, this can bring good luck and benevolence or misfortune and ill health. The energies that most strongly effect you are that of objects which are important to you or that you spend a great deal of time immersed in e.g., your desk, bed, office/arm chair.
One of the most important object to measure is the front door, as this is the particular quality of Ch'i (energy) that is being invited in to your home or workplace.
Use the fengshui ruler to attract good luck and stay away from bad luck
A person's date of birth and gender are believed to determine some of the major traits of an individual, as well as Feng Shui elements that can help one to achieve his or her goals.
The compass will calculate the auspicious and inauspicious directions for a person based on the gender and birthdate.
You can use it to find out what is the good direction for your main door, bed, workdesk and cooking stove
By learning your directions, you may improve daily lives and working environment, as well as refining areas for potential self development.
There are 4 auspicious directions and 4 inauspicious directions in everyone's life. For optimal success and harmony you should sleep and work and sit pointing to your auspicious directions.
The inauspicious direction alerts you to what you should avoid. Eg, if you are sleeping with your bed pointing to your inauspicious direction, it will bring health trouble in your life
For iPhone 3GS onward, the compass will adjust following the direction.