After my (ur) old Rowenta heating pad has 40 watts unfortunately slowly dissolved into its components I have to replace the heating pad AEG-ordered, which was also delivered promptly. Since I have a bad back, the pillow was the same tried. The term heating pad is probably exaggerated. Even at level "3", the pad is only slightly warm. As the old Rowenta had (40 W) considerably more heating power. For my purposes, the "heating pad" is useless and will be returned to Amazon. Two stars because of the good service and packaging of Amazon.