This listing is for one Cool Buddy Deluxe box set including a cooling unit, a Cooling Pad (4 sizes available), and a remote control. The Cool Buddy Deluxe works by heating or cooling water and then circulating it through a thin mattress or pillow topper placed, keeping you comfortable all night long using a fraction of the energy it would take to heat or cool your whole house all night long. The Cool Buddy doesn't replace your HVAC system, it simply reduces the night time load, saving you electricity and wear and tear. For example, Cool Buddy USA is based in Houston and before our Cool Buddy we would put our thermostat at 67 to stay comfortable on summer nights. With the Cool Buddy, we now set it on 76. The central AC still runs, keeping the temperature and humidity reasonable and the Cool Buddy takes care of the rest of the cooling, running for less than a penny a night!! Water is chilled using the simple physics of evaporative cooling, so you will hear the sounds of a small electric fan and water trickling over the evaporation membrane, but it's not too loud at 40 decibels on high. At Cool Buddy USA our goal is to help people sleep better and save money by offering the Cool Buddy product line at a price that everyone can afford. We don't have the fanciest product on the market but it gets the job done and the price is unbeatable.