Get ice cold in minutes or from heat to boiling by simply reversing the polarity, used for many CPU cooler applications to alternate heat sources, or even for your own custom car hotter/cooler. Since consist mainly of semiconductor material between ceramic plates and have no moving parts Each unit is fully inspected and tested Model: TEC1-1270,Size: 40mm x 40mm x 3.8mm Voltage: 12V Umax (V): 15V (A): 5.8A QMax (W): 65W Power cord: 300mm Net weight: 22g Color: White Material: Ceramic Installation This Cooling part is simple to install and use. Installation, find a battery, connect to the two wires of the cooler, obviously, you may feel cold at one end and hot at the other end, remember that the polarity of the determines a cold and hot end cooler. Experiments prove two refrigeration effect is much better than the single step. You can choose 3 conditions, of course, have a great support of the power supply. Note: Heat side requires heat sink all the time. Package includes: 4 x 12706