Excellent Product - Works as Promised
Your review: The sensor easily made the RedLINK wireless connection to my THX9421 IAQ thermostat. Although the description refers to the Prestige 2.0 Thermostat (THX9321), the sensor also works with the THX9421 with the ECM. Temperature control is very accurate, and allows the thermostat to hold temperature as designed. Humidity reading is also accurate. I have mounted the sensor in a kitchen to get a more useful reading of temperature than in the hallway where the thermostat is mounted. The small size of the sensor makes it less noticable. I would recommend this product.