Om ah vi ra hum kha ca rah (Manjusri's mantra) is the mantra that increases happiness and merit and helps to eliminate all harms and evil. This is the main meaning that was recorded in the fourth volume of Mantra of Great Enlightenment Bodhisattva Manjushri.
Within Vajrayana Buddhism, Manjushri is a meditational deity and considered a fully enlightened Buddha. Manjushri is depicted as a male bodhisattva wielding a flaming sword in his right hand, representing the realization of transcendent wisdom which cuts down ignorance and duality. In this pendant, Manjushri is depicted in a wrathful form when this Bodhisattva won the monster. This image has meaning of protecting, increasing great courage and exorcising.
When a person recites this mantra sincerely he/she will feel peaceful, achieve success at work and being blessed by Buddha. If a Buddhists recite this mantra once, they will receive protection for themselves. When they recite twice, family members and friends will be protected. At the three time reciting, they will receive great protection for overall. The more people regularly recite this mantra, the more successful and happy they will receive This mantra also eliminate bad karma, increase merit for people.
These the benefit of reciting this mantra: