Roland JUNO-Di Mobile Synthesizer with Song Player Bundle with Headphones, Two 10-Foot Instrument Cables, 10-Foot MIDI Cable, Velcro Cable Ties, and Polishing Cloth Professional synthesizer with over 1,000 instruments onboard Top-of-the-line voice engine Friendly, intuitive user interface Battery operation for mobile use (supports Ni-MH AA-size rechargeable batteries) MP3, WAV, AIFF, and SMF playback capability via optional USB memory