Keyboard Number of Keys 76
Type Graded Soft Touch
Touch Response Yes
Panel Language English
Slim, Light & Compact Design
Graded Soft Touch Keyboard
Advanced Wave Memory (AWM) Stereo Sampling
Built-in Stereo Speaker System
Piano Preset songs
Battery Power or AC adaptor
Auto Power Off mode
"The perfect solution for those wanting a light, simple, and stylish portable piano"
Yamaha's legendary stereo sampled grand piano voice gives true, realistic tone, whilst the compact dimensions and light weight of the NP31 make this instrument a truly 'personal' piano
http://asia.yamaha.com/en/products/musical-instruments/keyboards/digitalkeyboards/dk_-_piaggero/np-31/?mode=model#tab=product_lineup