Tensor Rings.The energy in these rings is said to be incredibly healing, acting as a conductor that neutralizes magnetic fields. This energy can bring calmness and stability and is said to stabilize the bio-magnetic energy fields in the body. cu-bits.org
To compare, this is the Empowerment Cubit 188 MHz half size. The ring is stronger in Herz and therefore longer. The bracelet measures approx 6.7 cm inside