The Super Sprouter Digital Heat Mat Thermostat by Hawthorne Hydroponics LLC is designed to regulate the temperature of heat mats used for propagation and cloning in hydroponic systems. This black thermostat has a digital display and can be set to maintain the ideal temperature for plant growth. With dimensions of 8 inches in height, 4.5 inches in length, and 3 inches in width, it is compact and easy to use. The set includes the thermostat itself, making it a convenient addition to any hydroponic setup.