Joomla 3.x display module on mobile onlyl

I need to display a module on mobile only.  I put it on the desktop in the top right position and set the module class suffix as [space]hidden-desktop.  It does show on the mobile, but still shows on the desktop.  Is there another setting to make, so it won't show on the desktop?  Thanks.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Peter HartCommented:
can you give a link to the site?
so actually it just displays on all devices at the moment?

is 'hidden-desktop'  style defined anywhere?
NetSueAuthor Commented:
Thanks.  I ended up just downloading Advanced Module Manager and that worked great.  I needed to get it done by noon tomorrow.
I found some info about " hidden-desktop" as a pre-defined style at
Steve BinkCommented:
Note that the examples shown on that site are specific to templates from particular companies.  Last I checked, Joomla was still using Bootstrap 2.3.2, which provides similar style classes.
Steve BinkCommented:
Can you post your solution?
NetSueAuthor Commented:
Sorry.  I installed the Advanced Module Manager and it gave more options to work with. I couldn't get the hidden-desktop class suffix, or other suffixes, to work right until I installed the module manager.  Set it to exclude desktop.  Nothing else suggested helped, and I don't know what bootstrap does.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.