[arcticdude]

My fantastic fan has a moisture sensor that closes the lid and shuts the fan off if it senses rain. It will reopen after a while and run until it senses rain again. There is a small rocker switch on the unit that activates the auto
function.

https://www.adventurerv.net/fantastic-ro...-p-87.html

Use caution buying from this site.  They often are selling old product that may or may not fit what you have.

They have a very short return window of 30 days, which comes into play when you’re putting several orders from different vendors into one project.  You won’t have all the parts to verify fitment before the return window closes. 

Further website pictures and descriptions are often specifically wrong. The site says a part fits a particular model, when it actually only fits and older model due to manufacturer changes.

Worse still is even when you point of the description is completely wrong, they won’t allow you to return an item.  You’re stuck with it.