The NU-X WK-520 is designed to cater to the essential needs of beginners as well as the educators. Well-selected Steinway grand piano sampling sound combined with the latest Dream 5708 chips, Italian 88-keys metal frame with scaled hammer action keyboard. In short, WK-520 is a high performance/price digital piano.Team up with ** APP on your smartphone or tablet and the bright LED indicators you‰Ûall defiantly fall in love with the new way of learning piano. Features: Style: Upright, PVC Rosewood finish Keyboard: 88-keys scaled hammer action with 4 dynamic curves Sound Chip: Top European Dream 5708 DSP chip - 5 dynamic levels of stereo piano sampling, Harmonic series simulation and Sympathetic Resonance Technology 300 built-in tones, 100 built-in Rhythm and 52 demo songs Max. Polyphony: 189 Dynamic Curve: 4 kinds of standard piano dynamic curves (Soft, Standard, Hard & Dynamic On/Off) Wireless Method: Bluetooth 4.0 Display: 7 segments x 3 LED Piano-learning Lights: 88-sets x 2 columns Controls: Play/Stop, Rhythm, Start/STOP | SYNC Start, Auto Chord, Variation, Intro/End, Dual keyboard, Metronome, Dual voice, Sound‰Û_ Effects: Delay & Reverb Master volume control Transposition: 25-semitones (-12~+12) Octave Shift: 3-Octaves (-8,0,+8) Function Option: Recording Function, Reverb, Chorus, Dual Voice, Dual Keyboard, Teaching Function Pedals: Soft, Damper, Sustain Metronome: Velocity 20-280bpm, beat 1-6 Connections: DC 12V Jack, USB MIDI Jack, Stereo Line Input Jack, Stereo Line Output Jack, Headphone Jack x 2, Pedal Jack Speakers: 4.5‰Û x 2 @10W Power supply: DC12V/2A Dimensions (W x D x H): 1370mm x 470mm x 850mm Weight: 48kg The authentic grand piano tone The authentic grand piano tone of the NUX WK-520 comes from well-selected Steinway grand piano sampling sound, the latest dream 5708 chips and customized stereo speakers. A long-lasting keyboard Thanks to the techniques originated from Italy, the 88 keys scaled hammer action keyboard is equipped with a metal frame that can ensure you have a perfect playing experience even after years of playing. Low-noise is another feature of the keyboard, plug in your headphone, sink yourself into the world of music even after midnight. 300 sounds and 100 Rhythm types. The NUX WK-520 comes with 300 different sounds and 100 rhythm types, together, they can bring you infinite possibilities and fun. Tired of practicing? Listen to the 52 built-in classical demo songs to take a break. 180 note polyphony With maximum 180 note polyphony, WK-520 can handle almost all players‰Ûa daily needs. 3 seg LED display can always let you keep track of the real-time status. Split keyboard and dual-tone Activate the split keyboard and set the split point. Get ready to teach and learn with 4 hands playing. Dual tone can give your playing more diversity and gorgeous sounds. Smart Rhythm You can add rhythms into your playing before your playing or during your playing. The auto chord function can be easily triggered to show functional chords during your composition or performance. Recording function and effects It‰Ûas easy to record your practice playing with the NUX WK-520, play it back, find your weakness and keep practicing. Once you‰Ûare into it, you can also compose something with the recording function. Want to have more fun? Try to add reverb or chorus effects into your playing. Learn with fun. Team up with ** APP on your smart phone or tablet and the bright LED indicators you‰Ûall definately fall in love with the new way of learning piano. Explore the app to find out more.