Zoo Med Hygrotherm Humidity & Temperature Controller is a Thermostat and Humidistat in one! It controls up to 1000 watts of combined temperature and humidity control devices. 2-in-1 Remote Temperature/Humidity Sensor with 5-foot cable. Great for use with Zoo Med?s Repti Fogger Terrarium Humidifier or Habba Mist Automatic Misting Machine. Nighttime temperature drop feature controlled by photocell. Built-in memory stores settings in case of power failure. Controls temperatures by turning on heating devices in “HEAT” mode or by turning on cooling devices (e.g., fan) in “COOL” mode. Alarm flashes when temperature or humidity reaches extreme high or low levels. Temperature control range: 50°F to 122°F (10°C to 50°C). Humidity control range: 15% to 95% RH (Relative Humidity).