Yamaha Portable Entertainment Station PSR-K1 - Manual (Page 104)

M.D.G., Pro Audio & Digital Musical Instrument Division, Yamaha Corporation
© 2003 Yamaha Corporation
WA79710 ???PO???.?-03C0 Printed in China
Yamaha PK CLUB (Portable Keyboard Home Page, English only)
http://www.yamahaPKclub.com/
Yamaha Manual Library
http://www2.yamaha.co.jp/manual/english/