The MCO Home External Sensor for MCOEMH7H-EH2 is designed for MCO thermostats to provide overheating protection. Positioned near the floor, the sensor monitors temperature and prevents overheating. Data from the sensor is used internally by the thermostat and is not displayed or transmitted via Z-Wave. Features: NTC sensor (R25℃=15KΩ, B25℃/50℃=3550K), 3m cable length, compatible with MCOEMH7H-EH2.