Your home air steward, check the home air quality anytime, anywhere, remotely control the fresh air fan, and call on-site maintenance service with one key. The special functions of "Dream Maker Fresh Air": - The status of the filter is clear at a glance, and the filter will be automatically reminded when the filter expires. - Timing switch even when offline Even if the fresh air fan is offline, you can still enjoy good air at home. - Personalized and customized smart scenes Automated scene settings, providing richer and more convenient linkage modes, truly achieving an energy-saving and efficient user experience. - Indoor air exceeds the standard, timely warning - On-site maintenance one-click access Visual supervision of the whole process of offline maintenance services, transparent service amount.