Ron,

I purchased one of these from Chris recently and am very happy with the
feature that was added.

The way that I found that it works is like this:

- Flip the wiper stalk to the intermittent position, let it do one wipe
- then return the stalk to off position, wait for as many seconds delay as
you want.
- then flip the stalk back to the intermittent position and it will delay
between cycles as long as you waited in the off position.

That said I don't know how long the max interval is.  I've done 30-45
seconds I think.

John Graham
88 Westy
Charlotte, NC