Found two blogs which describe this charming appliance as being pretty ubiquitous all through South America. Instead of the water supply running to your shower from a water heater, the heating element is IN THE SHOWER HEAD! So, I'm in a 36" X 36" stall, standing under a spray of water which is alternately too hot and too cold, and six inches above my head is a heater running on 440 volts, often connected with bare wires? I don't think so.