Indoor/Outdoor Humidity/Temperature MonitorSimultaneously Displays Internal and External Temperature and Relative Humidity. The remote ambient temperature relative humidity sensor is mounted on a cord over 3 ft long. Place the highly accurate sensor inside a desiccator, refrigerator, drying or other environmental chamber and view simultaneous displays of temperature and relative humidity outside on the large LCD display. Recalls min max readings on both parameters. C and F selectable. Wall