Ready-to-use and easy to activate for emergency use whenever warm therapy is required. Reaches temperatures up to 47.7 Celsius (118 Fahrenheit). Remains warm for up to 20 minutes. For sprains, strains, dislocations, swelling, bumps and bruising, minor burns, insect bites and stings, headaches, migraine and tension relief, muscle aches and spasms, cramps, toothaches, and sinus congestion. Ideal for sporting activities, industry, health clubs, schools, automobiles, first aid kits, home, and cottages. Dimensions: 15.2 x 25.4 cm (6" x 10")