Highlight Sound Source: 30 layers of dynamic PF.Concert sampling German nine-foot grand piano sound source String overtone resonance 5D simulation Multi-layer DSP algorithm Keyboard: Meijia M-802P, 88-key heavy hammer keyboard Dynamic 5D touch pulse signal response Maximum Polyphony: 768 (multi-channel stereo) Rhythms: 120 types (folk, pop, rock, jazz, classical, Latin) Timbre Control: Grand piano, dual pianos, dual timbres, dual keyboards Adjustable separation point Keyboard Separation: Double pianos, same pitch range Four-hand duet, string ensemble, wind ensemble Piano violin, guitar violin USB Interface: USB MIDI for unlimited song recording Supports 64-track 16-channel MIDI recording Multiple format support and system upgrades Audio Bluetooth: Bluetooth speaker for music playback and accompaniment MIDI Bluetooth: Wireless connection for MIDI signals Supports follow-up, composition, and music production Interface Summary: MIDI USB, headphone output, power, pedal, stereo line input/output Keyboard Strength: 5 types, 3,000 strength curves via computer connection