Premier Series Digital Thermostat with WiFi Capability, Switchable: Programmable or Non-Programmable, Choose 7-Day, 52 Day or 1-Day Programming, Up to 4 Heat 2 Cool Stage, Gas, Electric or Heat Pump Control, Fault Input, Comfort Recovery, Control to, or Monitor a 2nd Temperature Sensor, Programmable Fan, Set Point Limiting, Bi-Color LED Indicates a Cooling or Heating Demand, Power: 24VAC Return, Dims:4-1/2"H X 5-3/16"W X 1"D. Weight:3oz, Origin:China, In Mfg Box.