The HygroTherm is a thermostat and humidistat in one! It controls up to 1000 watts of combined temperature and humidity regulation devices. It has a 2-in-1 remote temperature / humidity sensor with a 5 foot cable. This innovative product also has a nighttime temperature drop feature contolled be a photocell, built in memory which stores settings in case of a power failure, and an alarm that can be set to flash when extreme variances in either temperature or humidity are detected. The HygroTherm's temperature control range is 50°F to 122°F (10°C to 50°C) and its humidity control range is 15% to 95% Relative Humidity.