The PRO1 IAQ R751WO Wireless Remote Sensor is an indoor temperature-sensing device designed to enhance comfort and climate control in compatible HVAC systems. Operating as part of the PROsync wireless system with the T755WHO thermostat, it monitors room temperature and occupancy, wirelessly communicating information to help regulate heating and cooling. It supports conventional heatin... https://www.partshnc.com/r751wo-pro-1-iaq-wireless-remote-sensor