Different slides (or sliders) for pc and mobile

Hi, first of all congrats for your themes and plug ins, they look very great!
I’ve a question about the slider: in my website I have a slider with two slides, and I need to show only the first of the two slides on mobile devices.
I’ve tried to modify the css to get this behaviour but without success
Can you help me to achieve this? To me, create two different sliders (one for pc and one for mobile) or avoid starting the transition could be options.
Thank you so much for your precious support.

Best regards.