The Bittree B48DC-HNSSH/E3 M2OU12L is a 1.5RU 1/4" long-frame Audio Patchbay, with front selectable TRS audio. The front features two rows of 24 jack inputs. On the rear, an equal amount of two rows of 24 E3 (3 pin ELCO connectors) output are featured, as well as a signal ground binding post.