Hello dear Mdkamran99 thank you so much for sharing your favourite household appliances with us, though you seem to be confused with what to choose, I mean A house appliance is referred to as a domestic appliance, those items you use in your kitchens or laundry room. A household appliance includes machine which assists in household functions such as cooking, cleaning and food preservation, cooling, and sound systems. Well, you've chosen your mobile phone, gulu gun, power bank and Refrigerator and among them my favourite is the later because it helps to preserve my food. Success!