Central to the practice is the mahamantra "Om Namah Shivaya" , which was often recorded in Kalavati Aai's own voice for devotees to use during meditation.
Not necessarily. Many devotees read directly from a tablet or phone. However, some prefer printing the most frequently used pages (e.g., the Guru Stotra and Aarti) to avoid digital distraction during worship. kalavati aai nityopasana pdf