Designed for use in household refrigerators, commercial coolers in supermarkets or convenience stores, dormitory compact fridges, and standard refrigerators, ensuring food stays fresh in any setting. The sensor integrates seamlessly into your fridge without occupying valuable space, optimizing energy consumption. Includes thermal fuses and defrost sensors that precisely monitor and maintain your fridge's internal temperature, prevent frost buildup, and enhance cooling efficiency. Suitable for homeowners who want to keep food fresh, renters who need appliance efficiency, restaurant operators requiring storage conditions, and enthusiasts who enjoy handson appliance maintenance. Use scenarios In a family kitchen refrigerator to extend freshness of groceries while reducing energy use In a dormitory or shared apartment mini fridge to maintain safe temperatures in compact spaces In a small cafe or convenience store cooler to keep perishable items at safe temperatures and minimize frost buildup