Twin thermocouple inputs Two thermocouples supplied Actual & relative modes Backlight for low light use Auto power off can be override Hold mode with Max Min & average mode -220deg C to 1372deg C Low battery indicator High precision dual thermocouple thermometer allows instant calculations of temperature from two points at the same time. Useful additional features include hold features for maximum minimum & average temperature. Specifications Range K-Type 0.1deg C-100 to 1372deg CK-Type 1deg C-100 to -200deg CK-Type 0.1deg F-100 to 2000deg FK-Type 1deg F2000 to 2501deg FK-Type 1deg F-100 to 328deg F Unitdeg C or deg F Resolution 0.1deg C1deg C 0.1deg F1deg F Measurement rate Every second Accuracyplusmn 0.1rdg 1deg C on -60deg C to 1372deg Cplusmn 0.1rdg 2deg C on -60deg C to -200deg Cplusmn 0.1rdg 2deg F on -76deg C to 2501deg Fplusmn 0.1rdg 1deg C on -76deg C to -328deg F According to temperature standard ITS-90 Accuracy At 18deg C to 28deg C 64deg F to 82deg F 75 R.H. Excluding thermocouple error. Temperature Coefficient 0.1 times the applicable accuracy specifications per deg C out of 18 to 28deg C Operating enviroment 0 to 50deg C at 70 R.HBattery 2x AAA Supplied Battery life 250 Hours typical Dimensions 25x 51x 133mm Tx Wx H Weight 148g with batteries & 2 thermocouples