PORTABLE ELECTRONIC Cooling & warming refrigerator

a "PORTABLE ELECTRONICP" 7.5L Cooling & warming refrigerator. These portable refrigerators use thermoelectric cooling, where heat is transferred from one junction to another when a low voltage DC power is applied, resulting in one junction cooling down and the other heating up. This type of refrigerator is often used for portability, running on 12V or 24V batteries. The box indicates the product is designed for both cooling and warming, making it versatile for various needs.