This digital thermostatic device allows growers to select and maintain optimal temperatures when germinating seeds or rooting cuttings for the fastest growth. It is compatible with all DSM&T heat mats, and most other 120V heat mats on the market as well. Besides its horticultural uses, the SPTEMP is also a great tool for homebrewing (maintenance of optimal fermentation temperature) and environmental control in reptile terrariums. The controller contains UL Recognized components for safety and reliability.