The PSD-SHLF is a shelf accessory designed to work with PSD-HDCA adapter so that it can easily install onto dual pole carts and stands. The PSD-SHLF is designed out of sturdy steel construction, making it extremely durable and yet still very easy to install and adjust along any length of a dual pole cart or stand. When used with the PSD-HDCA, the PSD-SHLF can be mounted directly to the dual poles without the need to remove the display.