1. LCD display for easy reading: The device comes with an LCD display that allows for more convenient reading, making it easy to track changes in temperature and humidity levels. 2. Multiple placement options: The product comes with adhesive backing and various placement methods, including standing up or sticking to the wall, making it easy to place in different locations for maximum convenience. 3. Powered by a single button battery: The device requires only one button battery for operation, making it easy to install and reducing waste from unnecessary packaging.(Not included batteries) 4. Compact design: Despite its advanced features, the device has a small and compact design that does not take up much space, making it perfect for small apartments or rooms. 5. Real-time monitoring of indoor temperature and humidity changes: The Smile face hygrometer provides real-time monitoring of indoor temperature and humidity changes, allowing users to quickly detect any changes and take action to ensure a comfortable environment. Product name:Thermohygrometer Temperature range:-10℃-50℃ Humidity range:10%-99% Colour:White Material:Plastic Size:45x45x16MM Package Contents: 5 * Temperature Humidity Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.