A duplexer is an attachment that enables the capability for double-sided
printing. Different makes/models will look different, of course, but my
HP4150 is larger in the back, since the duplexer is installed. Each add-on
is important to identify on install since it may change the exact driver
you use. It was a common problem that I saw years ago where a user could
not print on both sides due to a generic driver being used.

On Mon, Sep 24, 2018 at 2:40 PM Michael <bmike1@gmail.com> wrote:

> I got a new printer(HP Envy Photo 7855). It asked me if I had a duplexer.
> I'm sure I don't have one but what is it and how would I know if one is
> installed?
>
>
> --
> :-)~MIKE~(-:
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