Now with a new easy to use control pad the DeLonghi Dragon 4 TRDS40820T oil-filled radiator provides quiet heating, rapid warmth and a temperature that suits you and your home. Long-Lasting Heat Creating long-lasting heat, since the heated oil inside maintains the heat for longer allowing the radiator to generate warmth even when the unit is switched off. Chimney Design The unique "chimney" design with the special coil fins' shape provides a rapid flow of hot air that quickly warms up the whole room for an even and consistent heat distribution. Adjustable Knobs The adjustable knobs allow you to easily set the desired room heat, providing total control over temperature, power and timer settings. Easy to Move Ready to use with no assembly operations required, and is also extremely easy to move from one room to another thanks to the innovative pre-assembled folding castors.