Get ice cold in minutes or heat to boiling by simply reversing the polarity, used for numerous applications from CPU coolers to 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 partsEach device is full inspected and testedModel: TEC1-12706Size: 40mm x 40mm x 3.8mmVoltage : 12VUmax (V) : 15V (A) : 5.8AQMax (W) : 65WPower Cord : 300mmNet weight : 22gColor : WhiteMaterial: CeramicInstallationCooling piece is very simple to install and use. Before installation, to find a dry cell, connected to the two leads of the cooler, obviously cold you can feel at one end and the other end of fever, remember that the polarity of the lead and determine a good cooler cold and hot end. If you want to get a bigger system , it is recommended that two cooling mode, with two stack up with the above, a grim absorption following a fever, the experiments prove two refrigeration effect is much better than the single-stage, the condition can choose three, of course, have a large power supply support.Package Included:4 x 12706 Thermoelectric CoolerNote: heat side requires heat sink all the time.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.