ZJchao Computer CPU Cooling Fans Master Thermoelectric Peltier Refrigeration Cooling System Kit One Radiator Heatsink (90*90*40mm); One cooling radiator One Heatsink Part Fans(90*90mm) All screws for kit assemble.screws in random style and color Notes: 12VDC 6A Power is need,but not include in this Kit Semiconductor coolers are a form of solid state cooling that incorporates both semiconductor technologies and electronic assembly techniques