Feature: Size:23 x 2 x 2cm Working Voltage: 1.5V ( not include battery) Temperature Resolution: 0.10/ Fahrenheit Accuracy: 0.0 centigrade to +80 centigrade ( ±1 centigrade or 2 Fahrenheit) , other range ( ±5 centigrade - 10 centigrade or 10 - 20 Fahrenheit) Measuring Frequency: 1 Sec,10 sec, sleep, auto select On/off, centigrade/ Fahrenheit and hold buttons. Pen-type structure, stainless steel probe, straight measurement, easy to carry. Wide measuring range. Suitable for refrigeration, heating, food processing, rubber processing and other fields. Package Content: 1 x Digital thermometer 1 x Plastic tube Major Functions Available: Measuring Range: -50 centigrade to + 300 centigrade ( -58 to +572 Fahrenheit) Centigrade and Fahrenheit display selectable Low battery sensation and display Memory of last measure 15 minutes auto shutdown for power saving (option) Button function description: 1.ON / OFF: switch function 2.C / F: Celsius / Fahrenheit conversion 3.HOLD: temperature lock function, press the button when the temperature is locked, then press the lock function to lift. 4.MAX / MIN: high temperature and low temperature memory, press this button to display the previous high temperature, then press to display the previous low temperature, and then restore the temperature measurement. Because of logistics regulations, we can not provide the battery, the battery model is AG13 button battery