New Roland BK-7M Backing Accompaniment Sound Module works with FR-8x FR-3x FR-1x Add a world-class backing band to your show with the new BK-7m, a state-of-the-art module that packs an interactive band into a sleek, slim package. No bigger than a book, the BK-7m is a dream machine for the entertaining artist or solo musician who needs a backing band onstage, in the studio, or at home. With hundreds of great Tones, Music Styles, and rhythms onboard - all quickly accessible with one-touch buttons - the BK-7m will make you sound like a pro ensemble onstage. Choose from the library of built-in styles or play your own music files directly from USB for play-along accompaniment. You can even record your performances directly to USB memory for distribution and archiving.