Japan Health Personal Care Magunerupu Review

I just received a 50cm model for Christmas. My packaging says zero English so here's what it is/does. The instructions say to open and close the clasp carefully. (The clasp is a single link.) I've tested mine against steel and magnets. It appears to be slightly magnetized along the entire length. therapeutic effect? It's too early to tell. But I appreciate that someone thought of me. It's therapeutic right here. :^)