Descriptions: This product is used for measuring the changes of temperature and humidity of the environment. Then you can make some adjustments correspondently to improve your quality of life. Features: Standard measuring range, predict the weather more accurately Lightweight and easy to install, suitable for hanging or placing on a surface Simple and elegant design make you more comfortable when using it Specifications: Measurement Range: Temperature: -20~50; Relative Humidty: 0RH Accuracy: 2,5%RH(40~70%) Diameter: 9.5cm/3.74" Thickness: 2.5cm/0.98" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Thermometer Hygrometer