ActronAir LM24-2W M-Series Wall Controller is the secondary LCD pad that adds a second control point to an ActronAir ducted system, letting you set temperature, mode, and up to eight zones from another location without returning to the master controller. Without a working secondary controller, the system can only be driven from the primary pad. Fit the 100% Genuine ActronAir LM24-2W to restore convenient multi-point control. Low voltage inputs only — connecting 240VAC will damage the controller, and installation must only be performed by a qualified technician.