M-Audio Prokeys Sono 88 Portable Digital Piano portable digital piano with integral audio interface - all-in-one music-making solution 88 sem-weighted, velocity-sensitive keys-exceptional feel and playability 7 high-quality built-in sounds - instant access to piano, clav, strings and more line and microphone inputs - record vocals and instrutments includes on-board General MIDI sound set - 128 total sounds plus drums and percussion