The refrigerator are able to connect to wifi ?

Depending upon the model, if it has WIFI built into it, then yes. Wifi available on most newer models today. It allows for diagnosis service as well as many great features from the app. Some will send you alerts if the door is left open or the temp drops too low. Brands like Dacor have cameras inside so you can food shop while you’re looking at the shelves in the fridge to see what you need, pretty cool stuff! You need to check your user manual. If it has the features list, then it will connect to WIFI in your home.