The CS-50, C6® Screen Cleaner contains our Dry Nano-Particle Cleaning Formula that wipes away smudges, grime and fingerprints with ease. The Soft, retractable pad is safe and easy to use on all screens. It also includes a built-in ring on the body which allows easy attachment to key chains, carabiners, and other clips. The C6® Compact Lens Cleaner is perfect for cleaning tablets and smartphones. The CS-50 Screen Cleaner comes in a convenient 2-pack.