The Thermophore MaxHEAT Pad lets you tuck painful hands into soothing moist heat, just by pressing the pre-set switch. Which we call our "Constant Comfort Switch". It can also be used to completely encircle painful ankles, knees, elbows or wrists. And has a non-shedding, washable blended fleece cover included. The Constant-Comfort™ Switch provides you with 3 temperature settings of:(Low, Medium, and High) which provides optimum 25-minute treatments. It's designed especially to apply moist heat therapy to the hands and may also be used on elbows and ankles.