Allow your pet to snuggle up with up to 12 hours of safe, soothing warmth with the Pet Supply Imports SnuggleSafe Heating Pad. The plate-size pad contains no electric wires to worry about. Just place the SnuggleSafe inside your microwave, select Full Power, and set the timer according to how many watts your microwave pumps out. See the included chart for watts and times. When the microwave has finished, leave the SnuggleSafe inside for another minute. The non-toxic thermapol compound inside the pad retains heat for up to 12 hours. Do not exceed the recommended heating times. Overheating can damage the SnuggleSafe and may cause injury. Do not allow pets to bite or chew it. Ideal for whelping puppies.