NOTES: An Aqara Hub is required and sold separately. Requires a secured 2. 4 gigahertz WiFi network connection. The Aqara M2 or M1S Hub can connect up to 128 devices(*use of a repeater such as the Aqara Smart Plug or Aqara Smart Wall Switch(With Neutral) is required). REMOTE MONITORING: When the room temperature reaches above or below a certain threshold, the Aqara Temperature and Humidity Sensor can send a push alert to your phone or trigger the Aqara Hub night light. HOME AUTOMATION: The Aqara Temperature and Humidity Sensor can control other connected devices such as Aqara Smart Plug to ensure that your fan or humidifier maintains a constant level of comfort for you and your family. ACCURATE MEASUREMENT: Utilizes high-quality sensor from the industry-leading manufacturer, Sensirion. BUILT-IN AIR PRESSURE SENSOR: Monitors the ambient air pressure in the room. In addition, If you have any questions, please feel free to contact us.