Use contact differential temperature measurements (T1-T2) to display HVAC Superheat measurements. Display temperature differentials between both contact and IR temperature readings (T1, T2, T3). Rugged design that is easy to grip and hold. Large easy to view LCD display is easy to read from a distance. Store MIN/MAX and AVG readings. Use the IR thermometer probe to measure noncontact surface temperatures up to 1022 °F. Laser pointer helps you locate your target easily. Includes 2 bead type wire temp probes, IR Thermometer probe (TIF3320), rugged carrying case, and 9V battery. The TIF3310 / TIF3320 easily take differential temperature readings with the dual type-K thermocouple probes plus non-contact surface temperatures using the IR thermometer probe (included in item TIF3320).