Features: Use for small space cooling, learning the principle of semiconductor. refrigeration, the company developed cooling equipment research solutions. Refrigeration effect depends on the size of the cooling space, ambient temperature, heat insulation, ability, etc. No noise, no vibration, no refrigerant required. Work reliable, easy to operate and easy to adjust. Can used for plate cooling, pet bed cooling, test bench, small space cooling. Specifications: Power: maximum 180W (3 * TEC1-12705 chip ) Refrigeration power: 126W Maximum current: 15A Stable current: 11A Red line: "+", black line: "-" Product size: 300MM * 110MM * 75MM/11.8 *4.33 *2.95inch Note: it's impossible, if you want to cool your room, or use as air conditioning Package includes: 1 *Thermoelectric refrigerators