Key points : Absorbent Sponge , Soft Cover With Tie Band , Removable, Washable Cover , 100% Moisture-proof, Vinyl Covered Pad , 2 Hours Auto-off Control , 4 Heat Settings With Indicator Lights . Danger to reduce the risk of burns, electric shock, fire and accident, This product must be used in accordance with the following instructions : Do not use while in sleeping, Do not use on an infant.This pad is not to be used on or by an invalid, a paralyzed person, a sleeping or unconscious person, a person with diabetes, or a person with poor blood circulation, Do not use on the area of insensitive skin.Burns can occur regardless of the control setting. Check skin under pad frequently to avoid burning and blistering.Place pad on top of and not under the part of the body needing heat-burns can result regardless of the control setting.This pad is provided with a removable cover never use pad without cover in place.Do not tamper with this pad in any way. There are no user-serviceable parts. If for any reason this pad does not function satisfactorily return to the electric service station at.