The ProKeys Sono 61 portable digital piano with built-in audio interface is designed to bridge the gap between writing, performing and recording music. 61 semi-weighted, velocity-sensitive keys, advanced scanning technology and a stereo-sampled Steinway grand sound deliver an expressive piano experience. Additional instant-access sounds like electric piano, organ and clav-as well as a full onboard General MIDI sound set-round out a top-notch standalone performance solution.* You can also connect the bus-powered ProKeys Sono 61 to your computer and record your keyboard performance, vocals and instruments-or perform with all the all the keyboard sounds and instruments in your computer. Let ProKeys Sono 61 take you from the studio to the stage and beyond.*Optional power supply required for standalone use.Features: 61-key portable digital piano with integral audio interface > all-in-one music-making solution Semi-weighted velocity-sensitive keys > exceptional feel and playability 5 high-qu