Features: Get ice cold in minutes or heat to boiling by simply reversing the polarity, used for numerous applications such as cooling your CPU, video card, NANO Reef, laser diode, CCD camera, picnic cooler, beverage cooler , alternate power sources, or even for your own custom car drink warmer/cooler. Since they consit primarily of semiconductor material sandwiched between ceramic plates and have no moving parts. It will even generate electricity if you apply heat to one side while keeping the other side cold. This device must be used in conjunction with a heat sink to avoid burned. Model: TEC1-12709("TE" is the abbreviation of Thermo-Electric) The following data are measured under the condition that temperature constant for Th= 27 °C. Max cooling power: 90W Operates from 0-15.4V DC and 0-9A Tmax:>= 68 °C Operates from -50 °C to +100 °C Size: 40mm x 40mm x 3.5mm Package includes: 5 x TEC1-12709 Thermoelectric Peltier Cooler Buy with confidence Ship within 1-2 days by USPS. Most items take 7-12 working days arrive.