@eswillwalker @JimRosenthal4 The better consumer products (e.g Coway) do have that. I've thought about how to easily add one to a C-R box but don't have a great solution.
@eswillwalker @JimRosenthal4 更好的消费产品（例如 Coway）确实具备这一点。我考虑过如何轻松地将一个添加到 C-R 框中，但没有一个很好的解决方案。