This pendant is a traditional Tapiz style Indian amulet that is usually used to store notes, mantra or gem stones for good luck.
Ours is filled with the Protective & Good Luck
Na Nah Nahma Nahman Me Ouman
נ נח נחמ נחמן מאומן
The inscription in made on Klaf (paper used for the Sefer Torah), and with the special ink (used for Sefer Torah & Mezzouzot also).
All of the Breslev Peteks Mantras are written by a Sofer, checked one by one and secured in the Tapiz with layers of opaque protections.
Each Tapiz is made in Brass plated with 18k Gold 3 microns on a 40cm chain with 5cm extention, with a he's stone with or without an inscription (depending on the style)