The Super Sprouter̠ Digital Heat Mat Thermostat is easy to use. Simply plug the heat mat into the thermostat and place the temperature probe in desired location. The temperature control range is 68‰ö_ F - 108‰ö_ F (20‰ö_ C - 42‰ö_ C). Temperature is easily viewed through the back lit digital display, allowing you to accurately set ideal germinating or rooting temperatures. Maximum current rating is 8.3 amps/1000 watts. The Super Sprouter̠ Digital Heat Mat Thermostat comes with a one year warranty. ETL listed.