Prepare your conference room for guest visits and presentations with ProXtend's range of video adapter rings. Adapter rings are widely used in the broadcasting business, schools, auditoriums, hotels, and hospital conference rooms. The complete range of ProXtend adapter rings supports 4K@60Hz connections and comes with a lock, and tools to attach the adapter ring to the dedicated HDMI cable ensuring that the adapters are securely mounted and ready to connect to any device at any time. The ProXtend PX-AR21 comes with a Mini DisplayPort and USB-C adapter.