Low Voltage Thermostat 24V AC Heat and Cool 2 1/8 in Overall Depth 5 3/4 in Overall Height 7 5/8 in Overall Width Number of Cooling Stages - Conventional System 1 Number of Cooling Stages - Heat Pump System 1 Number of Heating Stages - Conventional System 1 Number of Heating Stages - Heat Pump System 1 Maximum Control Temperature 90 Degrees F Minimum Control Temperature 45 Degrees F