The Terma KTX 4 Blue Controller is designed to work in combination with the TS1 Element probe to provide a fully functioning heating element. Provides a choice of internal temp (30°c to 60°c) or ambient room temp (15°c to 30°c) regulation. 7 day Timer. 2hr drying function. 82,5mm length from thread down. 67mm wide square shaped face. 4x Buttons: Power, Drying Function, Temp +/-. Full operational control of the element on smartphone/tablet via BLUE (with “Terma BLUE-Line” App: IOS/ANDROID). Frost & overheating protection. Straight cable, no plug. IPx5 (safe for use in a bathroom). Class 1. Lot20 Eco-design Directive compliant (electric radiators needing adaptive start control). Guarantee: 2 Years.