Detailed Product Description Temperature Difference Controller TR3100TDFeatures Backlight LCD display 2 PT1000 inputs, 1 water pump output large LCD with slim casing design T1_min adjustable ,50°C by default T1_max adjustable, 90°C by default T1-T2_ON adjustable, 15°C by default T1-T2_OFF adjustable,10°C by default Limitation of storage tank temperature Temperature display °C / °F