The IceProbe is the ideal cooling solution for small aquariums ranging in sizes from 1 to 30 gallons. This quiet, reliable, and efficient chiller uses advanced thermoelectric technology, which utilizes the Peltier effect to directly convert electricity into cooling power. Weighing in at only 2 pounds, the IceProbe® is powered by a separate 12 volt D.C. power supply and draws less than 50 watts, "that's pretty amazing"! To get more familiar with the CoolWorks Ice Probe Chiller, view the User Manual.