The Advocate Moist and Dry Heating Pad Classic Size (12" x 15") provides Ultra Fast Warm Up and maintains consistent heat for greater comfort throughout all 4 heat settings. Designed with safety in mind, the unit automatically shuts off after 40 minutes. Use dry for moderate aches and pains or simply moisten the absorbent anti-microbial sponge insert for maximum deep, penetrating moist heat relief. Other features include an ergonomically designed controller, 9 foot extra long cord, machine washable cover and a reusable storage bag.