Built-in multiple chemical sensors developed via advanced electrochemical and semiconductor technology solutions to ensure stability and accuracy. The temperature and humidity compensation algorithm can effectively reduce the influence of environmental change and the reading resolution can be refined to 0.01mg/m3. Equipped with a dot-matrix E Ink screen that is similar to paper and protects your eyes. Consumes very little energy, and can last for more than 1 year without changing batteries. Multiple placement methods and easy magnetic detachment. With the Zigbee 3.0 protocol, it can work with other devices via a hub for cloud and local automation.