GERI 1 Single-Channel Thermal Relay Control Sensor Module Temperature Switch relay 12V The product is registered Trademark by GERI&reg; . Use thermistor to sense the environmental temperature, interface Maximum load: AC 0V-250V/10A, DC0V-30V/10A Use potentiometer to adjust sensitivity Intelligent adjust design Temperature range - 20 to 100 With power indicator(red), relay status indicator(blue)