Germination sprout seeds faster and more reliably with the seedling heat mat and thermostat controller combo set. Simply place under a planter with seeds ready to grow and watch them sprout quickly and vigorously. This heat mat and thermostat controller combo set increases the heat of soil moderately and provide optimum soil temperature for plants, so you have peace of mind when leaving your seeds to germinate. Improve propagation rates by maintaining root zone temperatures between 68-108°F (20-42°C) thermostat controller allows gardeners to select and maintain optimum rooting temperatures for faster seedling and cutting growth. The digital controller features a 3-button interface for simple operation and easy calibration. The heat mat automatically warms rooting area 10-20 F over ambient temperature, but does not overheat be used indoors or in a greenhouse, provides enough heat to get your garden established and vigorous show to use the digital thermostat controller. Press the "Set" button to display the current pre-set temperature. The thermostat's LED screen shows the current temperature whenever the "Set" is not activated. Press and hold the "Set" button for 3s to enter temperature selection mode. Press the "Up" or "Down" button to adjust the temperature. The thermostat's LED screen shows the numbers as you cycle through them. Press the "Set" button again to set the chosen temperature. The heating light cycles on when the mat is in the process of heating. When the LED is not lit, the mat is not providing heat. The light turns off automatically when the mat reaches the pre-set temperature. Pree and hold the "Down" button for 3s to display the temperature in Celsius. Press and hold the"Up" button to display the temperature in Fahrenheit. Place a propagation tray or other plant container directly on the heat mat. Cover your plant tray with a humidity dome to help seeds germinate faster. Instructions and growing tips printed on the mat. Provide perfect temperature for a range of warm-need things. Ideal for plants, aquariums, reptiles, and other animals.