The all new Mattress Cooler lets you sleep cool all night long without worrying about huge electric bills.Features:• 66% Larger 2.5L Water Tank• Includes One (1) Cooling Pad with increased thickness for improved durability• Quieter Operation• Upgraded cooling fan and circulation pump• Added ability to cycle fan on/off while pump keeps running• Upgraded remote (batteries not included)• Removable/Washable in line filterWater Based Cooling: The Mattress Cooler uses evaporative cooling to chill water 7-12 degrees below room temperature. The chilled water is then circulated through a thin cooling pad to pull away excess body heat trapped between your mattress and blanket.Sleep Better: The Mattress Cooler provides direct cooling exactly where you need it...between your mattress and your blanket.Cooling Pad Technology: Our cooling pads excellent thermal properties provide cooling at temperatures up to 78F while cotton pads require temperatures in the low 50's to start feeling cool.Save Electricity: The Mattress Cooler is not a complete air conditioning replacement...your AC is still needed to keep temperatures and humidity reasonable. However, using a Mattress Cooler will allow you to set your thermostat at about 76F from 8PM-8AM instead of 66F, saving you thousands of Kwh every year. Depending on your use, the Mattress Cooler could easily pay for itself in just a few months. Mattress Cooler Topper Pad 27"x63" - Black