PRO1 IAQ T755S Sensor Compatible Touchscreen 3 Hot/2 Cold 7 Day Thermostat with 6-Inch Screen Universal 2H/2C Conventional or 3H/2C Heat Pump Compatible with Indoor Remote Sensor (R251S) or Outdoor Remote Sensor (R250S) Add Indoor Sensor(s) to move the System Sensing Point or Sense a System Average