This Resideo Interface Module, also known as RedLink/IAQ, is a device designed to facilitate communication between heating, ventilation, and air conditioning (HVAC) systems and wireless thermostats. It operates on the RedLINK wireless technology platform, which allows for seamless integration with compatible devices. The module supports up to three heat and two cool stages for conventional systems and up to four heat and two cool stages for heat pumps. It also includes inputs for ventilation control (Vent), humidification control (Hum), dehumidification control (Dehum), and temperature sensor (Temp). The Resideo Interface Module is powered by 24VAC transformer or system power, ensuring reliable operation. Its compact design allows for easy installation in various locations within the HVAC system.