The digital thermostat enables gardeners to precisely set and maintain optimal temperatures to promote faster seed germination, cutting propagation, plant growth, and effective winter plant maintenance. It is compatible with heat mats and greenhouse heating systems with a maximum power draw of 15A or 1500W. For Heat Mat Use: Insert the probe approximately 1 to 1.5 in. into the root zone, or position it between the heat mat and a plant pot for accurate temperature monitoring. For Greenhouse Heater Use: Attach the probe using the suction cup mount to measure air temperature at the central area of the greenhouse. This ensures accurate control of electric greenhouse heaters or seedling heat mat systems. Important: Do not submerge the thermostat controller or probe in water.