The Super Sprouter? Seedling Heat Mat Digital Thermostat is easy to use. Simply plug the heat mat into the thermostat and place the temperature probe in the desired location. The temperature control range is 68?108? F (20?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 W. 6 ft power cord and probe with a suction cup.