AD-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-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. HDMI Cable sold separately.