That was an antique home appliance, err if you can call it as such. It does not use electricity. In fact it was used to save on electricity. That’s charcoal iron or plantsa de uling.
When I was a kid, I used to see my grandmother use plantsa de uling. She would get riron or charcoal then heat it up. It will be placed inside the iron and when it is hot enough is used to iron clothes.
The iron is made of pure iron metal hence it is very heavy.