Homewerks Radio Thermostat CT-80-H-K1 Wireless Thermostat with Wi-Fi Module, Dual Wireless Inputs and Large Touch Screen Dynamic large display touch screen thermostat with 7-day programming capability, works with nearly every HVAC system Works with nearly any HVAC system--including traditional furnaces and heat pumps-Requires 24 Volt AC power supply Allows for precise temperature regulation and less fluctuation with today's most sophisticated HVAC systems True auto mode to switches automatically between heat and cool depending on environmental factors Able to program up to seven independent periods per day, monitor and control HVAC system based on humidity as well as temperature