The Terma ONE D element is D shaped to match the profile and shape of the uprights on most standard chrome ladder rails - providing an element in a matching shape at the bottom of the rail. 2 heat settings 45°c and 60°c regulating the internal radiator temp, denoted by multi colour LED. No Timer*. 2hr drying function. *Compatible with the Terma TTIR Infrared Controller: 7 day timer, portable ambient room thermostat. 86mm length from thread down. 1x discreet underside button. Frost & overheating protection. Straight cable, no plug. IPx5 (safe for use in bathroom). Class 1.