Robertshaw 9801i2 Deluxe Programmable ThermostatWe've combined humidity and temperature control in one easy to install, easy to program thermostat. This versatile thermostat provides control over both humidification and dehumidification. When used in conjunction with our 9025i outdoor sensor, the 9801i2 automatically controls indoor humidity levels maintaining optimal comfort while minimizing condensation on windows. The new Setup Wizard allows you to spend 50% less time setting up the thermostat over competitive models. Everything is in plain language so there are no complicated codes or button combinations to memorize. The new 9801i2 is so user friendly it sets a higher standard in efficiency and simplicity for programmable thermostats. It is truly comfort made even easier. When coupled to our outdoor sensor, the thermostat will automatically determine the optimal indoor humidity levels to minimize condensation on windows. A special humidity calibration feature allows for fine-tuning of the automatic sensing feature. Note - dehumidification feature provides usually energized contact, deenergized on call for dehumidification and works only with HVAC systems with variable speed fans 1 Heat / 1 Cool with Auto Changeover Compatible with all single stage 24 VAC heating and cooling, including single stage heat pump systems 7-Day, 5-2, 5-1-1 or 24 hour programming 2, 4 or 6 events per day Integrated Humidity Sensing Worry-Free Memory Storage Indoor/Outdoor Remote Sensor CapableProgrammability: Up to 7 Day Programmable Application: Gas, Oil or Electric; Heat Pump Color: White User Interface: Soft Key Power Method: Hardwired Stages: 1 Heat/1 Cool Mounting: HorizontalSpecifications