RAKUWA Magnetic Necklace Metax Jewelry Type Black 50cm Relief Blood [Phiten] [Stiff Shoulders] [Stiff Neck] [Improves Stiffness] [Stiffness Relief]

---------------------------------------------------------------------- Material: String part (fabric): Polyester, polyester lame String part (core): Magnet Clasp: Stainless steel, magnet Medical device certification number: 224AGBZX00119000 Effect: Improves stiffness at the attachment site and improves blood circulation. Technology: Metax *Precautions for use: Do not use this product if you are using an implanted medical electrical device that is susceptible to electromagnetic interference, such as a pacemaker, or a variable pressure shunt for cerebrospinal fluid shunt surgery, as this may cause the device to malfunction.