Features: When you is not aware of the slightest changes in the weather, sensitive children and the elderly may already be cold, using intuitively expression to help you easily understand the comfort level. The sensors will monitors the temperature and humidity in real time. You can view the changes on the screen. You can monitors temperature and humidity on the APP, But it must be within the ranges of link. The sensors supports Voice assistant. You can check current temperature and humidity by voice. (NOTE:This function requires gateways support.) Easy, convenient and smooth operation user experience for family member. Specifications: Materials: ABS Size: about 4.30x4.3cm/0.14x0.14inch Package Includes: 1pc Temperature and Humidity Sensors note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.