2.Just open the sealed bag and stick or use the pad to anywhere** of your body that needs warmer, and it will heat automatically

3.8~20 hours of heating (different types apply to different duration of heating)

4.Evenly distributed heating: temperature ranges between 50-55 degrees Centigrade(or 122~131 degrees Fahrenheit) Highest temperature: 65 degrees Centigrade (or 154.4 degrees Fahrenheit)

Application: Keep warm in the cold area with continuous 8-20 hours of heating.

Effective relief of: muscular aches and pains, joint stiffness, backache, strains and sprains. Also relief of menstrual cramp.

5.No harm to environment

6. Only stick it to your underwear or other clothes closed to your body.