Media Screen sizes of Mobile Phone Tablets and Laptops

Suppose, we want to apply the given CSS effect only one device with a maximum width of 400 px, then we can write it as;

Example 1

Media Screen sizes of Mobile Phone Tablets

@media (max-width: 400px)

{
.a{ background-color:#FF0000; }

}

This Code will apply background color only on devices with width  <= 400px. It will not work on display screens with >400px.

Example 2

Responsive Media Screen sizes

@media (min-width: 400px)

{
.a{ background-color:#FF0000; }

}

This Code will apply background color on devices with width at least 400px. It means that this CSS will work on mobile phones, laptops and desktop screen etc.

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Laptops

Non-Retina Screens, Retina Screens.

Windows Phones

Windows Phone, Portrait, and Landscape.

Galaxy

Galaxy S3, Portrait, and Landscape, Galaxy S6.

HTC Phones

HTC One Portrait and Landscape.

iPhones

iPhone 4 and 4S, Portrait and Landscape, iPhone 5, 5S, 5C and 5SE, iPhone 6, 6S, 7 and 8.

Google Pixel

Google Pixel Portrait and Landscape, Google Pixel XL.

iPads Tablets

iPad 1, 2, Mini and Air, Portrait and Landscape,  iPad 3, 4 and Pro 9.7, iPad Pro 10.5.

Galaxy Tables

Galaxy Tab 2 Portrait and Landscape, Galaxy Tab S.

Nexus Tablets

Nexus 7 Portrait and Landscape, Nexus 9.