Media Queries – In between two widths

I’m trying to use CSS3 media queries to make a class that only appears when the width is greater than 400px and less than 900px. I know this is probably extremely simple and I am missing something obvious, but I can’t figure it out. What I have come up with is the below code, appreciate any help.

@media (max-width:400px) and (min-width:900px) {
    .class {
        display: none;
    }
}