Waterproof Refrigerator Digital Display Thermometer Freezer Size Value Record Hanging Refrigerator Temperature Monitor FEATURE:1. The maximum/minimum temperature value is displayed on the screen.2. Bracket or hook, new high quality, large screen design, simple and generous shape.3. High precision: multi-function, low energy consumption, high stability, high precision, and rapid temperature measurement.4. The measuring range is greatly increased, the stability is high, and the temperature memory and temperature maintaining function are provided. SPECIFICATION:  Product Name: Electronic Temperature MonitorBattery model: CR2032 button battery *1PCS (included)Appearance material: ABSTemperature range: -20~50°CMeasurement error: ±1 °CRefresh rate: 10SWorking principle: resistance temperature measurementWaterproof structure: grade IPX3Product weight: 50gProduct gross weight: 70gProduct size: 87*61*25MM OPERATING INSTRUCTIONS:1. Press the button on the switch or turn off the instrument.2. Celsius/Fahrenheit: Press the Celsius/Fahrenheit button to switch between Celsius and Fahrenheit.3. CLR: Press the button to clear/reset the MIN / MAX reading. BATTERY REPLACEMENT:Replace the battery when the display is slightly unstable or the display resolution disappears. Use the CR2032 battery, which is located under the battery cover on the back of the instrument. PACKAGE INCLUDES:1* thermometer