Soldering Iron Tester 220 Volt, Probe Connector Type K, Display 4-1/2 Digit LCD, 0.7 In, Number of Inputs Switchable Between 2 TC Or ST2200 Sensor, Resolution Factory Set At 0.1 Degrees F/C, Switchable To 1.0 Degrees F/C Via Internal Jumper, Accuracy Greater Of +/-1.0 Degrees F/C Or +/-0.1% Of Reading, Calibration Certificate NIST included, Temp. Range (C) 10 Degrees C to 700 Degrees C