The Perfect Sleep Pad is a heating and cooling pad for your mattress with a precise temperature control system that ranges from 46 to 118 degrees Fahrenheit.Using a network of micro tubes, this cooling mattress pad regulates the surface temperature of your mattress by actively circulating water throughout the night.With the ability to fluctuate the water temperature 72°F or 40°C at full programmed range (with a sleep temperature as cool as low as 46°F / 8°C and a sleep temperature as warm as 118°F / 48°C), only a fraction of the electrical operating cost of air-conditioning is incurred: ver