The TT-MTM wall mounted controller is suitable for the Classic (THHA), Elegance (THE), Intense (THY& THYW) and the Max (THX) range. This controller allows for Heat modulation of High/Medium and low controls, timer and on/off functionality. This controller needs to be installed by a licenced electrician. It is possible to use one controller to control multiple heaters. However the maximum current rating of 16A must not be exceeded. For example, 2 x THH1800A (Classic Heater) can be connected to the controller. This controller needs to be installed by a licenced electrician.