1.Artborne Hand Warner 2.Muscle relax, Pain release, 3.MSDS,SGS,ROHS,CE,EN71 ... ,clear,purple,green Functions Activate blood circulation,Pain relief ,muscle/eye relaxation,ect. Validity3Years Storage and useAmbient temperature at -10-60 ... For physiotherapy , our reusable heat pads works especially effective on muscle relaxation , muscle aching , back aching , neck and shoulder achind ,Cramps ,arthritis ...