The KMR-1 Music Stand by Kurzweil is an optional, user-installable sheet-music holder for the PC3K8, PC3K7, PC3X, PC3(76), PC3LE8 and PC3LE7 series of instruments. Held in place by 4 back-panel screws, the KMR-1 is a convenient, space-saving alternative to traditional stand-alone designs. (Early-run PC3X models do not support the use of the KMR-1 as they lack the necessary chassis mounting attachments. To determine if your PC3X will support the KMR-1, look for 2 pairs of vertically mounted screws on the PC3X back-panel. Facing the back-panel, the left pair will be near the P in the PC3X logo; the right pair will be just to the left of the MIDI thru/out switch.) For more than 28 years, Kurzweil continues a tradition of excellence and innovation in developing world-class musical instruments.