DeLonghi TRH0715SH Oil-Filled Radiator with Overheat Audible Alarm Extra safety feature sounds an alarm to alert the user if the radiator becomes overheated Wheels snap easily into place with patented pre-assembled wheels; no tools required Maximizes radiant heat flow while maintaining a low surface temperature with patented thermal slots Customize your heating needs with the adjustable thermostat and three heat settings Never needs refilling; unit is permanently sealed with pure diathermic oil for stable and efficient heating