TCT013K Thermocouple Thermometer Product Details The mini-K thermocouple thermometer will accept ANY mini-male plug probe; immersion, surface, air or bead. Probe measurement -83.2° F to 1999°F (-64 to 1400° C). Accuracy of thermometer: +/- 1% of reading or 1.8°F (1°C) whichever is greater plus probe accuracy. LCD error messages: thermal shock and measurement outside of probe range. Low battery icon. Select C or F Roughly the size of a cell phone, the TCT013K features battery life of 100 hours of continuous use and auto shut off after 15 seconds. Ambient Operating Range: 32 to 122 deg.F Response Time (90%): less than 1 second Dimentions: 3x 1.7 x 0.8 inch Weight(no battery): 1.5 ounce Batteries: 1 lithium