YTHX9421R5085WW THERMOSTAT WHITE PRESTIGE 2-WIRE IAQ KIT WITH REDLINK TECHNOLOGY 7 DAY PROGRAMMABLE UP TO 4H/2C HEAT PUMP OR 3H/2C CONVENTIONALCONTAINS THX9421R5021WW COLOR TOUCH SCREEN THERMOSTAT THM5421R1021 EQUIPMENT MODULE AND 2 DUCT SENSORS