LockState Connect LS-90i WiFi Internet Programmable Thermostat Easy to use menu system with large backlit touch screen display and works with nearly every HVAC system - including traditional furnaces and heat pumps- target Temperature Range: 47F to 95F Able to control 3 stages of heat and 2 stages of cool, this allows for more precise temperature regulation and less fluctuation with today's most sophisticated HVAC systems True Auto mode to switch automatically between heat and cool depending on environmental factors and program up to 7 independent periods per day Monitor and control your HVAC system based on humidity as well as temperature with the ability to control an external air baffle, external humidifier AND de-humidifier Must have either power from the furnace ("C" or "Common" wire) or an external transformer to power the thermostat in order to run the Wi-Fi module; Connections: C, H, B, O, W, W2, W3, Y1, Y2, RH, RC, G, A, DH, EX