The limited edition Celviano AP-245 features the latest A.i.R (Acoustic and Intelligent Resonance) tone generation system and an 88 note tri-sensor hammer action keyboard. A.i.R technology not only offers new and detailed piano samples but also re-creates the fine nuances of a real acoustic piano including damper resonance and hammer response. The resulting grand piano tone is of the highest quality setting a new standards in quality and value.