Resideo YTHX9421R5101WW 7Day White Thermostat Wireless Outdoor Sensor

The Resideo YTHX9421R5101WW Thermostat Wireless Outdoor Sensor is a versatile and essential add-on for enhancing the efficiency of standard central air condition and heat pump systems and those with auxiliary heat. This sensor is used to detect the external climate to help provide more efficiency to your HVAC systems. It is meant to be easy to incorporate into other systems. The sensor has an 8.06” square display that offers clear and readable information. This sensor has flexible operation options with auto and manual switch between heat and cool and it can work on 50 Hz and 60 Hz.