Package of 5 TEC1-12706 Thermoelectric Cooler by Ace Seller GET ICE COLD IN MINUTES OR HEAT TO BOILING by simply reversing the polarity. WIDELY USED FOR numerous applications from CPU coolers to alternate power sources, or even for your own custom car drink warmer/cooler. CONSIST PRIMARILY OF semiconductor material sandwiched between ceramic plates and have no moving parts MUST BE USED IN CONJUNCTION with a heat sink to avoid burned FITTED WITH 6-inch insulated leads