Super Sprouter Digital Heat Mat Thermostat The Super Sprouter® 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° F - 108° F (20° C - 42° 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 Sprouter® Digital Heat Mat Thermostat comes with a one year warranty. ETL listed.