This is a line selector, the AS-4Ⅲ (pin plug type), which allows you to select up to 4 components (switch input/output). - Gold-plated terminals - Connection terminals: RCA terminals - Output terminals: L/R output - Input terminals: 4 systems - Included items: Original box, instruction manual - Size: 160(W) x 65(H) x 95(D) There are no scratches or stains, but it is a used item, so it is as expected. Please judge from the images. Everything in the images is included. Thank you for viewing.