... (not freezer),don’t flex themetal disc; take it out after 20-30 minutes, as cold pad.Function ... :1)For physiotherapy ,it works especially effective on muscle relaxation, muscle aching, ... use clean water to clean up.3)Keep out of reach of children.Advantages1. With 10years experience ... .From our ISO 13485:20030certified factory,we turn out 700,000 units that enable us to deliver ...