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. This is the Right hand version, so needs to sit on the right hand side of the towel rail - as the wire comes out of the back. If fitted on the left the wire will come out of the front. 2 heat settings 45c and 60c regulating the internal radiator temp, denoted by multi colour LED. 1x discreet underside button. Frost & overheating protection. No Timer. 2hr drying function.Compatible with the Terma TTIR Infrared Controller: 7 day timer, portable ambient room thermostat. 86mm length from thread down. 310mm internal probe length. Straight cable, no plug. IPx5 (safe for use in bathroom). Class 1. Wattage Selection Advice: To correctly choose the right wattage of element for your towel rail or radiator, you should look at the output of the chosen radiator as central heating (hydronic) in watts and cho