Honeywell Interface Module w/ 2 Duct Sensor

Honeywell Prestige® Interface Module Kit, IAQ Equipment, For Use With: All THX9421R5021 Prestige® 2-Wire IAQ Thermostat and all Versions of Prestige® IAQ Thermostat and the VisionPRO® Thermostat with RedLINK Technology, 18 to 30 VAC, 50/60 Hz, Gray, 4-13/16 in W x 1-5/8 in D x 9-5/16 in H, Import

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Equipment Interface Module controls up to 4-stages of heat and 2-stages of cool in a heat pump system and up to 3-stages of heat and 2-stages of cool in a conventional system. Three sets of Universal IAQ contacts to control humidification, dehumidification and ventilation. Four sensor inputs for wired sensors or dry contact devices.