Adding convenience, the touch screen central controller allows the user to control up to 32 thermostats from one location such as your kitchen or hallway. On leaving for holidays for instance, the controller saves you having to go into each individual room to re-program thermostats. Rooms are also listed showing whether they are calling for heat or not and even a history is logged of hours run/temperatures in each room. The system can be also added to with optional Internet and SMS capability. Wiring is low voltage screened Cat-5 cables.