Features: 1WORKING PRINCIPLE: Incorporate semiconductor and electronic assembly techniques reverse the polarity to get ice cold in minutes or heat to boiling. 2APPLICABLE SCENES: Used for many applications from CPU coolers to alternate power sources great for your own custom car drink warmer or cooler as well. 3WORK PARAMETERS: The power of the semiconductor cooling module is 36W the rated voltage is DC12V and the internal resistance is 3.0-3.3. 4EASY CONNECTION: The semiconductor heatsink is equipped with wire about 300mm length easy to connect and use which is stable and reliable. 5DURABLE MATERIAL: The heatsink is made of excellent semiconductor and 704 silicone rubber ensuring stable performance and high cooling efficiency. Specification: Item Type: Semiconductor CoolerProduct Size: Approx. 40 x 40mm / 1.6 x 1.6inInternal Resistance: 3.0-3.3Cooling Power: 36WComponent Logarithm: 127Assembly Pressure: 85N/cmWire Specification: Length: Approx. 300mm / 11.8in (3mm)Temperature Range: -55-83 (too high ambient temperature will directly affect the refrigeration efficiency)Material: Semiconductor 704 Silicone RubberWeight: Approx. 24g / 0.85oz Package List: 1 x Semiconductor Cooler