Touch & ActionKeys: 88 full-size keys. Key Surface: Simulated ebony and ivory. Hammer Action: Tri-sensor Scaled Hammer Action Keyboard II. Touch Response: 3 sensitivity levels, plus off. Sound & ElectronicsSound Engine: Multi-dimensional Morphing AiR Source. Polyphony: 256-note polyphony (prevents dropped notes). Tones: 22 built-in tones (including two distinct grand piano profiles). Speakers: 4-speaker system (2-way, 40 Watts total output). Acoustic Simulator: Lid simulator, string resonance, damper resonance, and key-off simulator. Features & ConnectivityPedals: 3 built-in pedals (Damper, Soft, Sostenuto) with half-damper support. App Compatibility: Works with the Casio Music Space app for control and learning. Recording: 2-track MIDI recorder and USB audio recording (WAV format). Headphones: 2 standard stereo jacks (great for silent practice and teaching). USB Ports: Type A (for flash drives) and Type B (to connect to computerstablets