They are manufactured in Arizona and are the genuine product as invented by Ralph Bergstresser.
Over the years, many copycat products have emerged and one vendor is even using the original EIP logo without permission. As early as June of 2015, EIP (Energy Innovations Products) began using a laser-engraved logo on all of their discs/pendants.
Carry in a purse or pocket.
Once energized, they'll remain in that condition possibly indefinitely.
Uses: Under your pillow. Brings relaxation & calm. Place on a leather or silk cord.
Helps with Chakra balancing. Place on injured area of any living thing.