Commercial Room Thermostat, Stand-Alone (Non-Communication), Programmable, 24 VAC, Conventional Systems: 3H/3C, Heat Pumps: 4H/2C, Temperature & Humidity Sensors, 4 Configurable Inputs, 3 Configurable Relay Outputs, Economizer Enable, Air Quality Management, Touchscreen LCD Display, 5-Year Warranty ( Minimum Siemens order quantity of $250.)