Piano Expansion Board, For installation in CME UF5 / 6/7/8 Master Keyboards, 3x Acoustic piano sounds, strings and electric piano, 80 Voices, Hall and chorus effects, 2x 6.3 mm Stereo jack, 1x Headphone jack (6.3 mm jack), Up to 2 boards (for example, CME UF DP-1 and Waldorf Nano Synthesizer) can be installed in a CME Master keyboard.