The Resideo TH6210U2001 T6 Pro Programmable Thermostat is a versatile and easy-to-use gadget that improves the efficiency of your HVAC system. This programmable digital low-voltage thermostat features a vivid 5.44" LCD screen and a thermistor sensor for precise temperature control. https://www.partshnc.com/th6210u2001-resideo-2ht1cl-prog-24v-t6-stat