The Extech TM300 is a compact meter for differential temperature measurements. A large, backlit LCD displays T1, T2, and T1-T2 differential, plus min, max, and average values. It has a wide temperature range with 0.1°/1° resolution, and it has readout in °C, °F, or K (Kelvin). The data hold function freezes reading on display. It features an offset key used for zero function to make relative measurements, and an auto power off with disable feature. Complete with two general purpose Type K bead wire temperature probes, three AAA batteries, and pouch case.