Explanation of product: The MK3000 digital piano has a special CPU developed for electronic keyboards, and is equipped with different configurations. The MK3000 digital piano series meets various demands for high performance and low cost.Features: 1) Synthesizer SAM2133 / SAM9733 8Mbits MM 168 single chip 2) Keyboard: max. 88 keys 3) Function keys: max. 22 x 5 matrix 4) Memory: RAM, USB disc 5) Display: LCD / LED 6) 64 polyphonic 7) 128 GM sounds 8) Up to 9 drum sets (2133: 9 drum sets, 9733: 8 drum sets, MM168: 3 drum sets) 9) Chinese musical instruments (2133: 25 instruments with 42 drums, MM168: 8instruments with12 drums) 10) Reverb, chorus (2133 / 9733: 8 reverb / chorus types, MM168: 4 reverb / chorustypes) 11) 100 styles Functions: 1) 2 spaces for demo song (1 - Rom, 2 - USB Disc) 2) More than 2,000 songs (128M USB disc) 3) When playing demo in ROM, function repeat, pause, forward, back supported 4) Erases demo songs in USB disc 5) Downloads demo songs from USB disc 6) Register memory: 16 register memories 7) Function menu: 8) Friendly interface with menu operation 9) Fully controlled functions for users 10) Record:a) Max. 5 melody tracks and an accompaniment tracksb) Large recording memory (128k bytes) holds more than 1000 notesc) Saves to standard MIDI files (USB disc needed) 11) Most used function: push a key to select the most used functions, such as reverb,chorus, touch response, dual, harmony, percussion, keyboard split and freeze 12) Functions for USB disc:a) Indicates the USB disc stateb) Normal file operation supported, such as creationc) Erases the playback of standard MIDI files (format 0/1) in USB disc