Thermometer Range -39.9°C to 149.9°C Resolution 0.1°C Accuracy ± 0.5°C Power Single CR2032 button Battery Battery Lifetime 5000 hours Probe Ribbon surface probe (type K thermocouple) Dimensions 25mm x 150mm Weight 20 g MAX/MIN - Press the Max/Min button to display the maximum reading and a 'Max' symbol will flash in the display. Press the Max/Min button again to display the minimum reading and a 'Min' symbol will flash in the display. Press the Max/Min button again to return to normal readings. To reset, simply hold the Max/Min button for three seconds. Please note: Max/Min readings are not saved, so switching off the instrument will clear these readings. °C/°F - Unscrew the battery cover at the end of the instrument and remove the battery. To select the desired temperature scale, slide the switch to °C or °F. HOLD - Press the Hold button to retain the displayed reading, °C or °F will flash, press the Hold button again to resume taking temperature. Please note: Once Hold is selected the unit will not automatically turn off. AUTO-OFF - The unit will switch off automatically when the probe cover is replaced or after 1 hour of inactivity