Feature :  This is not only a temperature but also a humidity sensor With this sensor you can monitoring your home/office's data by your phone.  It can also link with other xiaomi products make them work when reach certain temperature or humidity. Make your phone more sensitive and make your home smarter :)    Note :  It is from Aqara, a Xiaomi 'ecological chain's' company.  It is an Atmos Version Temperature Humidity Sensor, so it can tell you the air pressure.    Specification :  Material: Plastic;  Color: White;  Product size (L x W x H): 36 x 36 x 9 mm / 1.42 x 1.42 x 0.35 inches;  Wireless: Zi-Bee;  Temperature detection range and Accuracy: -20℃ - +60℃, ±0.3℃;  Humidity detection range and Accuracy: 0 - 100%RH (No condensation), ±3%;  Air pressure detection range and accuracy: 30KPA - 110KPA, ±120Pa;    Package Includes :  2 x Temperature Humidity Sensor;  1 x User Manual