Yamaha P255B 88 Keys Graded Hammer Weighted Action Keys Best Portable Contemporary Digital Piano Keyboard with Grand Piano Sound, Controller App for iOS with Dual Amplifiers and Speakers Piano Bundle Yamaha portable digital stage piano for practice and live performance. Pure CF Sampling brings the sound of a Yamaha CFIIIS concert grand piano to life. Onboard stereo speaker system provides lush sound without an external PA. Sound Boost mode helps you cut through the mix onstage Built-in rhythm patterns let you add drums and percussion to your performance. 88-Keys with Synthetic Ivory Keytops. Graded Hammer Action. Authentic Grand Piano Sound 256 Note Polyphony Key-Off and Sustain Samples , String Resonance , Effects, Dual Amplifiers and Speakers , Controller App for iOS , USB Flash Drive Playback and Storage. Yamaha digital piano P-255B is an 88-key digital piano that features the company's Pure CF Sound Engine (same engine as found on the Clavinova pianos) and a GH (Graded Hammer) keyboard that together deliver a genuine piano playing experience. Source samples were taken from Yamaha's concert grand pianos resulting in an authentic grand piano sound with dynamic bass, warm mid-range and clear highs. The instrument is housed in a slim and elegant cabinet. GH (Graded Hammer) keyboard mimics the different-sized hammers for the different-sized strings of a real piano. Pure CF Sound Engine features the recorded sounds of Yamaha concert grand pianos. Rhythm track functionality with ten different rhythm patterns that are suited to pop, jazz, bossa nova, and many other types of music regularly performed on the piano. Rhythm tracks each have dedicated intros and endings. 88-key, 88 key, Fully Weighted Digital Stage Piano , Pure CF Sampling CFIIIS Sounds , Graded Hammer Action Keys , Graded Hammer Action , Grand Piano Sound , Controller App for iOS ,USB Flash Drive Playback and Storage , digital piano , USB Flash Drive Playback and Storage , keyboard 88 keys weighted action , 88 key hammer action weighted keyboard, digital piano 88 key weighted , digital piano Yamaha , digital piano 88 key , digital piano headphones , digital piano cover, digital pianos ,stereo