FOR SALE IS A VINTAGE CASIO SK-1 SAMPLING SYNTHESIZER KEYBOARD FROM THE 890s, THIS IS VERY COOL TO RECORD YOUR OWN VOICE AND PLAY IT BACK IN DIFFERENT KEYS, WORKS WITH BATTERIES OR POWER PACK, IT TAKES A 7.5 VOLT POWER PACK I DON'T HAVE THE ORIGINAL THE ONE I HAVE IS 6 VOLT AND WORKS FINE, IT IS INCLUDED,