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. Brand new and high quality Made of high quality material, durable Please check the product size, model and make sure it can be used before purchasing When you encounter problems, please contact us, we will try our best to help you solve them Whether the product satisfies you, we want to hear your opinion Every customer can enjoy 30 days refund or replacement for Damaged/Quality Issues