This refrigerator door displays the current internal temperature of each section, the proper refrigerator temperature is 40…
https://www.rawpixel.com/image/3259989/free-photo-image-food-safety-safety-temperature-refrigerator-thermometer-fsis-food-and-inspection-service-temperatureFree Image from public domain license
Free convenience store fridge photo, public domain market CC0 image.