Details: Brand new and high quality How to replace the battery: Replace the battery when the reading becomes unstable or the display fades. Open the screw and ABS housing and replace the new CR2032 battery. Useful Operational Tips: Do not soak it in water When the display is dim, please change the battery as the instruction says and tighten the screws. It needs about a minute for reaction about the temperature. It is designed to work with a freezer or refrigerator. Once you reboot the thermometer, the max/min temperature will be reset too. Specification: Measuring Temperature Range: -20 ° C to 50 ° C / -4 ° F to 122 ° F Accuracy: ± 1 ° C / ± 2 ° F Resolution £ º0.1 ° C / 0.2 ° F Waterproof Structure: Level IPX3 Operating Voltage: 3V, CR2032 battery, 1PCS Item Dimensions: 8.7 X 1.2 X 4.5 cm / 3.4 x 0.5 x 1.8-inch Item Weight: 45g Color: White，black Material: plastic Package content: 1 x refrigerator thermometer 1 x user manual Note: 1. Please allow slight deviation for the manual measurement data and make sure you do not mind before ordering. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Our products are made of environmentally friendly materials, safe and non-toxic, and will not cause harm to the human body. Please read the product manual carefully before purchasing, and use it correctly according to the operation steps. If you encounter any difficulties or problems during use, please contact us in time, we will solve them for you as soon as possible. Your support is the driving force for us to move forward, and we look forward to sharing your experience and experiences with us. For the quality problems or defects of the product itself, we will provide unconditional return or repair service.