&lt;p&gt;AD&amp;minus;RING is a stainless steel ring of HDMI adapters that attaches to your display cable so you can plug different presentation sources into the HDMI cable. Laptops tablets smart phones digital cameras and net books have a variety of connectors for displaying their content. AD&amp;minus;RING provides the presenter easy access to the appropriate adapter for connection to the HDMI infrastructure. This simple and effective solution supports mobile device content and keeps the adapters secure and in place for the next presenter.&lt;br /&gt;&lt;br /&gt;Note: HDMI cable sold separately.&lt;br /&gt;* For easy installation or modifying AD&amp;minus;RING adapters please see ACCESSORIES &amp; RELATED PRODUCTS.&lt;br /&gt;&lt;br /&gt;&amp;bull; Secure your adapters with the cable clamp and security loop.&lt;br /&gt; &amp;bull; Supported Resolutions &amp;mdash; AD&amp;ndash;RING&amp;ndash;1 AD&amp;ndash;RING&amp;ndash;2 AD&amp;ndash;RING&amp;ndash;3 &amp;mdash; Up to 1080p and 1920x1200. AD&amp;ndash;RING&amp;ndash;4 AD&amp;ndash;RING&amp;ndash;5 &amp;mdash; Up to 4K@ 60Hz (4:2:0) AD_RING&amp;ndash;6 &amp;mdash; Up to 4K@ 60Hz (4:2:0) AD&amp;ndash;RING&amp;ndash;7 &amp;mdash; USB&amp;ndash;C: Up to 4K@ 60Hz (4:2:0) MDP: Up to 4K@ 60Hz (4:4:4) DP: Up to 1080p AD&amp;ndash;RING&amp;ndash;8 &amp;mdash; USB&amp;ndash;C: Up to 4K@ 60Hz (4:2:0) MDP: Up to 1080p/1920x1200.&lt;br /&gt; &amp;bull; Fits HDMI cables from 3mm to 9mm in diameter.&lt;br /&gt;&amp;bull;  Included Accessories &amp;mdash; 1 ABS cable clamp 2 sets of foam rubber inserts 4 sets of Torx T10 screws and nuts.&lt;/p&gt;