I have a really lightly used Yamaha portable keyboard device for sale. I do have the handbook of guideline, so that you might learn how to utilize the several functions for voice, sounds, drums, MIDI, and so on. The keyboard contains 134 different voices, and this can be muscled building supplement by acquiring extra sound cards. The system runs off battery power, or with Air Conditioning adapter, which is included with the keyboard sale. The keyboard likewise has a port for a sustain foot pedal, although my system did not had one consisted of, and an internal headphone jack. The real system name is PSR-E203 / YPT-200, in case you wish to Google for certain manufacturer info. The rate is $100.00 or around $2.77 per white key, the black keys are included at no additional charge. Or you might merely make an offer. All I can do is state no!