A mantra is filled with shakti (divine power) and there are actually different Beej mantras explained in Hindu puranas. Mantra “OMM” is the basic of every one of the mantras. It is actually further expanded into yog beej, tejo beej, shanti beej and Raksha beej. A Mala/Rosary bead to meditate: https://edwardk432vky8.wikimeglio.com/user