【Real-Time Data Synchronization Update】: iKiKin temperature humidity meters gauge has 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 ±0.3°C/±0.54°F accuracy in temperature -19°C~60°C (-2.2°F~140°F) and ±3%RH accuracy in humidity 0~100%RH. 【App Notification Alert ＆ Buzzer Alarm】: thermometer hygrometer set to preset temperature and humidity range through "Tuya Smart" or "Smart Life" app. If the temperature is out of 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 from your home. 【Upgraded Large Easy-To-Read Backlit LCD Display】: Our thermometer hygrometer features a large 2.9" backlight LCD display and bold numbers that make the display easy to read even in dim conditions, allowing you to easily grasp the current temperature and humidity conditions at a glance. 【Remote Temperature ＆ Humidity Monitoring】: Use the 2.4G wi-fi network to easily set up wifi, and automatically scan and add devices after turning on Bluetooth through Tuya APP, you can view the temperature and humidity sensors remotely, you can use this project to monitor your baby room, wine cellar, garage. Smart features let you adjust your environment in time. 【Use Anywhere ＆ Built-In Rechargeable Battery】: The temperature humidity meters is powered by an USB cable as a backup battery, which can be used for more than 5 hours after a power failure. Our thermometer hygrometer features can be used anywhere and you can even attach them to walls, perfect for wine cellars, greenhouses, kitchens, and more.