Want greater control over the temperature of your seedlings? The Jump Start Digital Temperature Controller for Heat Mats accounts for the room temperature while it helps regulate temperature for your specific crops. Compatible with all Hydrofarm and Jump Start Heat Mats. Water resistant stainless steel temperature probe. Range from 68 - 108 degrees Fahrenheit. LED indicator lights. Three-prong grounded plug. Max current: 8.3 amps/1000 watts.