BIAL Cushion Heated Shawl and Lap Blanket USB Seat (Black) Size:79*46cm/ 31"*18" The size of the heating element is 12*20cm/4.7*7.8" Temperature = 100 F - 113 F The USB Heating Blanket is a soft plush velour blanket surrounding a heating pad. Can be used to cover knee, wrapped waist, draped over the shoulders, seat cushion, heat.