Two Channels Thermocouple Thermometer support K Type , 2.2" LCD display with Back Light Measurement Range: -328°F ~ 2498°F , Accuracy: +/- 0.3% + 2°F USB PC Interface with cable: Real Time Monitor, Graphic, Datalog , Storage , data import / export Input Protection: 60V DC or 24Vrms AC Maximum Certificate of Calibration : National Measurement Laboratory R.O.C (NML/ROC) . Meter Made in Taiwan Product Specifications - Measurement Temperature range : K: -200°C ~1370°C (- 328°F ~ 2498°F) - (May require appropriate Thermocouple probes) Accuracy : Accuracy is specified for ambient temperatures between 18°C (64°F) and 28°C (82°F). The specifications do not include thermocouple sensor error. ±(0.2% of reading+1°C) ±(0.2% of reading+2°F) below 200°C (200°F) Temperature resolution : 0.1°C < 200°C / 0.1°F < 200°F, 1°C ≧ 200°C / 1°F ≧200°F Temperature coefficient： 0.01% of reading + 0.03°C per °C (<18°C or >28°C) Sample rate： 3 time per second Battery type： 9V battery x 1 Battery lifetime： Approx. 100 hours (alkaline battery) Operation temperature： 0°C to 50°C (32°F to 122°F) Operation humidity： 10 to 90%RH (no condensing) Storage temperature： -20°C to 60°C (-4°F to 140°F) Storage humidity： 10 to 75%RH Dimensions/ Weight： 184mm(L) × 64mm(W) × 30mm(H)/ Approx. 250g Standard Accessories： Instruction manual, Carrying Case, Battery 9V AAA x 1 pcs, Windows software (download from us), K type bead probe x 2 pcs, USB Cable Support: Windows XP/ VISTA/ Windows 7/ Windows 8/ Windows 10