Real-time Data Synchronization Update: The iKiKin temperature and humidity meter features a built-in high-precision temperature and humidity sensor. Data is accurately measured and updated in real-time without delay, providing you with the latest environmental changes. Temperature accuracy ±0.3°C/±0.54°F within -19°C~60°C (-2.2°F~140°F) and ±3%RH accuracy for humidity within 0~100%RH. App Notification Alert and Buzzer Alarm: Set your thermometer hygrometer to a preset temperature and humidity range via the "Tuya Smart" or "Smart Life" app. If the temperature falls outside the set range, the buzzer will sound immediately, and you'll receive an instant app push notification. Stay informed about temperature and humidity changes in your home anytime, anywhere. Upgraded Large, Easy-to-Read Backlit LCD Screen: Our thermometer hygrometer boasts a large 2.9" backlit LCD screen and bold numbers, making the display easy to read even in low light. You can effortlessly see current temperature and humidity conditions at a glance. Remote Temperature and Humidity Monitoring: Utilize the 2.4G Wi-Fi network for easy setup. Automatically scan and add devices after enabling Bluetooth via the Tuya APP. You can remotely view temperature and humidity sensors, making this project ideal for monitoring your baby's room, wine cellar, or garage. Smart features allow you to adjust your environment in a timely manner. Use Anywhere and Built-in Rechargeable Battery: The temperature and humidity meters are powered by a USB cable with a backup battery, providing over 5 hours of use after a power outage. Our thermometer hygrometer can be used anywhere and can even be attached to walls, perfect for wine cellars, greenhouses, kitchens, and more.