The TempMinder 4-Zone Temperature and Humidity Station includes 3 remote sensors and 1 indoor display station to monitor both temperature and humidity of 4 separate zones. Features simultaneous readings of all 4 zones with programmable high/low temperature and humidity alarms. Perfect for RV fridge/freezer, compartments/basement, heat safety and exterior monitoring. Monitors 4 zones with simultaneous temperature and humidity readingsSet high/low temperature and humidity alarmsPerfect for RV fridge/freezer, compartment and exterior monitoringIncludes 3 remote sensors and base stationMaximum range of 165' (50 M)1 Year Limited Warranty