The P515 features an 88-key NWX (Natural Wood X) keyboard with synthetic ebony and ivory keytops with escapement, Yamaha CFX & Bosendorfer Imperial concert grand piano samples, 256 note polyphony, 40 Voices + 18 Drums/SFX Kits + 480 XG Voices, 40 Rhythms, intuitive control via Smart Pianist app, Audio recording WAV 44.1Khz, 250 song recording, Aux L+R outputs for connection PA, MIDI In/Out, USB To Device/Host, (15W + 5W) x 2 speaker amplifier system.