FOUR FEATURES 1,SLEEP COOL AND SLEEP WARM This product, to use advanced semiconductor technology, temperature from 18 °C - 48 °C, free adjustment, and achieve the effect of cooling and warming for sleeper. Small heating and cooling area and quickly to get heating or cooling, what’s more can keep a constant temperature, make human body have more healthy sleep. 2, Water temperature control, Environmental-friendly Cool and Warm mattress just need to re-fill water in certain period, it do not produce freon and have no Air conditioning compressor, more environmental-friendly comparing to regular air conditioner. 3,Water temperature control, safe Just some water is circulating inside of mattress, through the semiconductor to reach heating or cooling, so have No power No radiation, can open the window and sleep under natural ventilation environment. 4,Healthcare Principle of healthcare: The magnetizing system of the machine can magnetize cyclic liquid that inside of the mattress constantly, for that, can produce magnetic field effect. The effect promote human blood circulation, eliminate fatigue, still can solve the papula and eczema on the back of people who lie a long time on beds or who can not self-care patients, and other discomfort troubling.