WIDE RANGE OF TEMPERATURE MEASUREMENT - Range of main unit is -50 ~ 1350 °C (-58 ~ 2462°F); 4 Temperature display with DIFFERENTIAL TEMPERATURE (T1-T4) - With 4 channel K Type thermocouple inputs; FUNCTIONAL DESIGN - With Data Hold Function, auto power off setup, MAX/MIN/AVG reading recording function; USER FRIENDLY - Low battery indicator and large display with backlight; WIDE RANGE OF APPLICATIONS - Oven, furnace, ceramic, pottery, molten metal etc.