The Hoss Germination Thermostat allows growers to select and maintain optimal rooting temperatures when germinating seeds or rooting cuttings for fastest growth. This will ensure that optimal germination conditions are present so that maximum germination rates may be obtained. This thermostat is compatible with all Hoss Germination Mats (17 Watt, 100 Watt, and 150 Watt) and most other seedling heat mats. It includes a temperature display range from 32F to 140F with your choice of a Celsius or Fahrenheit display. Operation is easy with a simple, push button display for changing the temperature settings. Each unit includes a temperature probe and a 6 power cord.