[Real-time data synchronization update]: The iKiKin temperature and humidity meter has a built-in high-precision temperature and humidity sensor. The data is accurately measured and updated in real time without delay, providing you with the latest changes in the environment. Temperature tolerance 0.3C/0.54F Temperature accuracy -19C~60C (-2.2F~140F) and 3%RH Humidity accuracy 0~100%RH. The temperature and humidity meter can be set through the "Tuya Smart" or "Smart Life" application to set the preset temperature and humidity range. If the temperature exceeds the set range, the buzzer will sound immediately, and you will receive an app push message immediately. Anytime, anywhere, let you know the temperature and humidity changes in your home. Our thermometer hygrometer features a 2.9-inch backlit LCD display with bold numbers. [Remote temperature and humidity monitoring]: Use 2.4G wifi network to easily set up wifi, automatically scan and add devices after turning on Bluetooth through Tuya APP, and can remotely view temperature and humidity sensors. You can use this project to monitor your baby room, wine cellar, and garage . Smart features allow you to adjust to the environment in real time. Use Anywhere & Built-in Rechargeable Battery: iKiKin Thermo-Hygrometer is powered by USB cable, built-in rechargeable battery as a backup battery, it can be used for more than 5 hours after power off. Our thermometer hygrometer features can be used anywhere, you can even mount them on the wall, perfect for wine cellars, conservatories, kitchens and more.