The STC-1000 is a versatile small electronic temperature controller, with heating and cooling functions, plus audible alarm. The unit is is able to always keep your aquarium or Vivarium at a stable temperature. This mini Temperature Controller is an excellent and convenient multifunction device for controlling temperature in any of your home projects. By utilizing the temperature controller, you can provide an environment with optimal temperature. This advanced temperature controller can measure and control temperature from -50 to 90 degrees C. This device is also suitable for laboratories use and other temperature-controlled systems.