Plastic Digital Refrigerator Thermometer | Waterproof Thermometer with Large LCD Display For Cold Freezer & Fridge | Portable Thermometer for Indoor <p>&nbsp;</p> <p>Technical parameters and specifications:<br />●Temperature measurement range: -50℃～+110℃ (-58℉～+230℉)<br />●Temperature measurement accuracy: &plusmn;1℃</p> <p>●Display resolution: ℃<br />●Complete machine size: 55mm&times;42mm&times;16mm<br />●Sensor type and length: thermistor sensor, wire length 1 meter<br />●Using environment: Temperature: 0℃～+60℃; Humidity: 20%～85%<br />Power supply: one button battery (LR44, 1.5V).<br />Instructions:<br />◆Slide the battery compartment cover on the back of the product in the direction of the arrow and insert an LR44 button battery. Pay attention to the battery.<br />You have to pretend to be the opposite.<br />◆This product can work as soon as it is powered on. Press the ON/OFF button lightly to shut down. Press the ON/OFF button again.<br />Power on.<br />◆Put your thumb in the gap between the bracket on the left side of the battery compartment and the back shell, and push the bracket upwards.<br />Place it randomly on the table.<br />◆In the power-on state, lightly press the ℃/℉ key to cycle through the display of Celsius and Fahrenheit temperatures.<br />◆If the actual measured temperature is lower than -50℃, the LCD screen will display "- - - .-℃" (sensor detection<br />The head cannot be used in an environment above 80&deg;C to avoid thermal deformation of the sensor probe)</p>