This very small Digital Thermostat module (48 x 40 x 15mm) is powered by ST Microelectronic’s STM8 micro controller, needs a power supply of 12V DC (max. 70mA), and can switch loads up to 20A (max. 125V AC). The Digital Thermostat module comes with many programmable functions, like calibration and output delay time, can be used for heating or cooling applications in a range of -55 to +110 degrees Celsius with adjustable hysteresis. The included sensor element is watertight.